{"id":1958,"date":"2026-08-19T07:07:27","date_gmt":"2026-08-19T12:37:27","guid":{"rendered":"https:\/\/www.lappymaker.com\/blog\/?p=1958"},"modified":"2026-08-19T07:07:27","modified_gmt":"2026-08-19T12:37:27","slug":"horizontal-lines-on-macbook-screen","status":"publish","type":"post","link":"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/","title":{"rendered":"MacBook Display Horizontal Lines: Why It Happens &#038; How to Fix It?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Is your MacBook screen showing horizontal lines? The problem can come from several sources, such as a display connection issue, damaged display components, physical damage, etc. In some cases, the issue may be temporary and subside after a few troubleshooting steps, and others may indicate a hardware fault that requires professional repair.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This guide explains the common causes of<\/span><b> horizontal lines on MacBook screen<\/b><span style=\"font-weight: 400;\">, how you can troubleshoot yourself, and the signs that indicate when you should take it for a professional diagnosis or repair.\u00a0<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_73 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<label class=\"ez-toc-title\" style=\"cursor:inherit\">Blog Content<\/label>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Identifying_the_Type_of_Display_Issue_on_MacBook\" title=\"Identifying the Type of Display Issue on MacBook\u00a0\">Identifying the Type of Display Issue on MacBook\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#What_Causes_Horizontal_Lines_on_MacBook_Display\" title=\"What Causes Horizontal Lines on MacBook Display?\u00a0\">What Causes Horizontal Lines on MacBook Display?\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#A_Worn_Display_Flex_Cable_Flexgate\" title=\"A Worn Display Flex Cable (Flexgate)\">A Worn Display Flex Cable (Flexgate)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#GPU_Graphics_Card_Issue\" title=\"GPU (Graphics Card) Issue\">GPU (Graphics Card) Issue<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#The_T-Con_Board\" title=\"The T-Con Board\">The T-Con Board<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Software_and_macOS_Issues\" title=\"Software and macOS Issues\">Software and macOS Issues<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Physical_Pressure_or_Impact\" title=\"Physical Pressure or Impact\">Physical Pressure or Impact<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#What_to_Do_When_Your_MacBook_Screen_Shows_Horizontal_Lines\" title=\"What to Do When Your MacBook Screen Shows Horizontal Lines\">What to Do When Your MacBook Screen Shows Horizontal Lines<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Step_1_%E2%80%93_Restart_and_Observe\" title=\"Step 1 &#8211; Restart and Observe\">Step 1 &#8211; Restart and Observe<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Step_2_%E2%80%93_Check_for_macOS_Updates\" title=\"Step 2 &#8211; Check for macOS Updates\">Step 2 &#8211; Check for macOS Updates<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Step_3_%E2%80%93_Reset_NVRAM\" title=\"Step 3 &#8211; Reset NVRAM\">Step 3 &#8211; Reset NVRAM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Step_4_%E2%80%93_Reset_SMC_Intel_Macs_Only\" title=\"Step 4 &#8211; Reset SMC (Intel Macs Only)\">Step 4 &#8211; Reset SMC (Intel Macs Only)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Step_5_%E2%80%93_Connect_an_External_Monitor\" title=\"Step 5 &#8211; Connect an External Monitor\">Step 5 &#8211; Connect an External Monitor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Step_6_%E2%80%93_Do_the_Tilt_Test\" title=\"Step 6 &#8211; Do the Tilt Test\">Step 6 &#8211; Do the Tilt Test<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Signs_Your_MacBook_Display_Needs_Professional_Repair\" title=\"Signs Your MacBook Display Needs Professional Repair\">Signs Your MacBook Display Needs Professional Repair<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Understanding_Horizontal_Lines_on_MacBook_Display\" title=\"Understanding Horizontal Lines on MacBook Display\u00a0\">Understanding Horizontal Lines on MacBook Display\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Get_Your_Professional_MacBook_Display_Repair_at_Lappy_Maker\" title=\"Get Your Professional MacBook Display Repair at Lappy Maker\">Get Your Professional MacBook Display Repair at Lappy Maker<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Frequently_Asked_Questions\" title=\"Frequently Asked Questions\">Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Why_do_I_have_horizontal_lines_on_my_MacBook_Air_screen\" title=\"Why do I have horizontal lines on my MacBook Air screen?\u00a0\">Why do I have horizontal lines on my MacBook Air screen?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Can_a_software_update_cause_horizontal_lines_on_my_MacBook_screen\" title=\"Can a software update cause horizontal lines on my MacBook screen?\u00a0\">Can a software update cause horizontal lines on my MacBook screen?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#What_is_Flexgate_and_does_it_cause_MacBook_screen_lines\" title=\"What is Flexgate and does it cause MacBook screen lines?\u00a0\">What is Flexgate and does it cause MacBook screen lines?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#How_do_I_know_if_my_MacBook_display_flickering_is_hardware_or_software\" title=\"How do I know if my MacBook display flickering is hardware or software?\u00a0\">How do I know if my MacBook display flickering is hardware or software?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Can_I_fix_horizontal_lines_on_my_MacBook_Air_screen_at_home\" title=\"Can I fix horizontal lines on my MacBook\u00a0 Air screen at home?\u00a0\">Can I fix horizontal lines on my MacBook\u00a0 Air screen at home?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#How_much_does_it_cost_to_fix_a_MacBook_screen_with_horizontal_lines_in_Gurgaon\" title=\"How much does it cost to fix a MacBook screen with horizontal lines in Gurgaon?\u00a0\">How much does it cost to fix a MacBook screen with horizontal lines in Gurgaon?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#Will_my_data_be_safe_during_a_MacBook_display_repair\" title=\"Will my data be safe during a MacBook display repair?\u00a0\">Will my data be safe during a MacBook display repair?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/#How_long_does_a_MacBook_display_repair_take_at_Lappy_Maker\" title=\"How long does a MacBook display repair take at Lappy Maker?\">How long does a MacBook display repair take at Lappy Maker?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Identifying_the_Type_of_Display_Issue_on_MacBook\"><\/span><span style=\"color: #fe7a01;\"><b>Identifying the Type of Display Issue on MacBook\u00a0<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Before jumping to fixes, we must first identify the pattern of the <\/span><a href=\"https:\/\/www.lappymaker.com\/blog\/macbook-screen-problems-symptoms-causes-tips-and-fixes\/\"><span style=\"font-weight: 400;\">MacBook display issue<\/span><\/a><span style=\"font-weight: 400;\">, as they don\u2019t always have the same cause.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>If you see thin static lines<\/b><span style=\"font-weight: 400;\"> that don&#8217;t move, it could be a display panel issue or a GPU fault<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Lines that appear at a specific screen angle?<\/b><span style=\"font-weight: 400;\">\u00a0 Almost always a flex cable problem.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Flickering that comes and goes<\/b><span style=\"font-weight: 400;\"> could be anywhere from software to hardware.\u00a0<\/span><\/li>\n<\/ul>\n<p><b><i>Quick tip: <\/i><\/b><i><span style=\"font-weight: 400;\">Take a screenshot by pressing <\/span><\/i><b><i>Cmd + Shift + 3.<\/i><\/b><i><span style=\"font-weight: 400;\"> If the lines appear in the image file, the problem is happening at the software or GPU level. If the screenshot looks clean, your display hardware is the likely culprit.<\/span><\/i><\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"What_Causes_Horizontal_Lines_on_MacBook_Display\"><\/span><span style=\"color: #fe7a01;\"><b>What Causes Horizontal Lines on MacBook Display?\u00a0<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1959\" src=\"https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/What-causes-horizontal-lines-on-MacBook-Display.jpg.jpeg\" alt=\"What Causes Horizontal Lines on MacBook Display?\" width=\"885\" height=\"435\" srcset=\"https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/What-causes-horizontal-lines-on-MacBook-Display.jpg.jpeg 1987w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/What-causes-horizontal-lines-on-MacBook-Display.jpg-300x147.jpeg 300w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/What-causes-horizontal-lines-on-MacBook-Display.jpg-1024x503.jpeg 1024w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/What-causes-horizontal-lines-on-MacBook-Display.jpg-768x377.jpeg 768w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/What-causes-horizontal-lines-on-MacBook-Display.jpg-1536x754.jpeg 1536w\" sizes=\"auto, (max-width: 885px) 100vw, 885px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">If your <\/span><b>MacBook Pro display horizontal lines<\/b><span style=\"font-weight: 400;\">, the problem can result from anything from software to hardware faults or damage to internal components. Here are a few common causes:<\/span><\/p>\n<ul>\n<li aria-level=\"1\">\n<h3><span class=\"ez-toc-section\" id=\"A_Worn_Display_Flex_Cable_Flexgate\"><\/span><b>A Worn Display Flex Cable (Flexgate)<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The display flex connects your screen to the logic board through the hinge. Every time you open and close your MacBook lid, the cable bends, and over time it wears out.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This can result in <\/span><b>MacBook Air horizontal lines on screen<\/b><span style=\"font-weight: 400;\"> with flickering at certain angles, uneven backlighting at the bottom of the screen, or a display that cuts out completely. This issue was so widespread that it later came to be known as \u2018<\/span><a href=\"https:\/\/www.lappymaker.com\/blog\/flexgate-issue-with-macbook-pro-display\/\"><span style=\"font-weight: 400;\">Flexgate<\/span><\/a><span style=\"font-weight: 400;\">\u2019.<\/span><\/p>\n<ul>\n<li aria-level=\"1\">\n<h3><span class=\"ez-toc-section\" id=\"GPU_Graphics_Card_Issue\"><\/span><b>GPU (Graphics Card) Issue<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Your MacBook&#8217;s GPU is responsible for everything you see on screen. When it starts struggling, whether due to overheating or hardware degradation, it can produce visual glitches, including <\/span><b>horizontal lines on MacBook Air screen<\/b><span style=\"font-weight: 400;\">, colour distortions, or a flickering display.<\/span><\/p>\n<ul>\n<li aria-level=\"1\">\n<h3><span class=\"ez-toc-section\" id=\"The_T-Con_Board\"><\/span><b>The T-Con Board<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The T-Con (also known as Timing Controller) board processes the video signal between the logic board and your LCD panel. On MacBook Pro and Air models from roughly 2018-2021, a failing T-Con board frequently caused screen line issues requiring a display assembly repair.<\/span><\/p>\n<ul>\n<li aria-level=\"1\">\n<h3><span class=\"ez-toc-section\" id=\"Software_and_macOS_Issues\"><\/span><b>Software and macOS Issues<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">When you see <\/span><b>horizontal lines on MacBook screen<\/b><span style=\"font-weight: 400;\">, it isn\u2019t always a hardware problem. It could be a corrupted graphics driver, an outdated version of macOS, or a software conflict. They can all produce similar symptoms.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If the flickering started right after you updated macOS, or if it only happens within certain apps, this is a likely culprit.<\/span><\/p>\n<ul>\n<li aria-level=\"1\">\n<h3><span class=\"ez-toc-section\" id=\"Physical_Pressure_or_Impact\"><\/span><b>Physical Pressure or Impact<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">When debris collects between the keyboard and screen, or even long-term pressure from a tight bag, it can stress the display panel or internal connectors. This can show up as <\/span><a href=\"https:\/\/www.lappymaker.com\/macbook-air-screen-replacement\"><span style=\"font-weight: 400;\">MacBook Air<\/span><\/a><span style=\"font-weight: 400;\"> horizontal lines on screen even without obvious damage.<\/span><\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"What_to_Do_When_Your_MacBook_Screen_Shows_Horizontal_Lines\"><\/span><span style=\"color: #fe7a01;\"><b>What to Do When Your MacBook Screen Shows Horizontal Lines<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">While these steps won&#8217;t fix hardware damage, they\u2019re worth going through before you proceed with professional repairs. It takes a few minutes to check and could save you a trip to a repair centre.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_1_%E2%80%93_Restart_and_Observe\"><\/span><b>Step 1 &#8211; Restart and Observe<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A basic restart clears temporary software faults. After restarting, check if the lines or flickering are still there. If they disappear, you likely had a software glitch.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_2_%E2%80%93_Check_for_macOS_Updates\"><\/span><b>Step 2 &#8211; Check for macOS Updates<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1961\" src=\"https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Screen-Shot-2026-08-19-at-3.03.57-PM.png\" alt=\"\" width=\"856\" height=\"482\" srcset=\"https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Screen-Shot-2026-08-19-at-3.03.57-PM.png 1160w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Screen-Shot-2026-08-19-at-3.03.57-PM-300x169.png 300w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Screen-Shot-2026-08-19-at-3.03.57-PM-1024x577.png 1024w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Screen-Shot-2026-08-19-at-3.03.57-PM-768x433.png 768w\" sizes=\"auto, (max-width: 856px) 100vw, 856px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Go to <\/span><b>System Settings \u2192 General \u2192 Software Update<\/b><span style=\"font-weight: 400;\">. Running an outdated version of macOS is a known trigger for <\/span><b>horizontal lines on a MacBook Air screen<\/b><span style=\"font-weight: 400;\">, particularly after major macOS releases.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_3_%E2%80%93_Reset_NVRAM\"><\/span><b>Step 3 &#8211; Reset NVRAM<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">NVRAM stores display settings like resolution and refresh rate. Resetting it can resolve display glitches caused by corrupted settings.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Shut down your MacBook<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Turn it on and immediately hold <\/span><b>Option + Cmd + P + R<\/b><span style=\"font-weight: 400;\"> for about 20 seconds<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Release and let it restart normally<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Note: On Apple Silicon Macs (M1, M2, M3 chips), NVRAM resets automatically at startup. This step is more relevant for Intel-based MacBooks.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_4_%E2%80%93_Reset_SMC_Intel_Macs_Only\"><\/span><b>Step 4 &#8211; Reset SMC (Intel Macs Only)<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The SMC controls hardware functions including display behaviour. For MacBooks with a T2 chip:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Shut down, then hold <\/span><b>Shift + Control + Option + Power<\/b><span style=\"font-weight: 400;\"> for 10 seconds<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Release all keys, then turn the MacBook on normally<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Step_5_%E2%80%93_Connect_an_External_Monitor\"><\/span><b>Step 5 &#8211; Connect an External Monitor<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Plug your MacBook into an external display. If the external monitor looks perfectly fine, the issue is isolated to your internal screen and not the GPU or logic board.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Step_6_%E2%80%93_Do_the_Tilt_Test\"><\/span><b>Step 6 &#8211; Do the Tilt Test<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Slowly open and close the lid while watching the display. If <\/span><b>horizontal lines on the MacBook Air screen<\/b><span style=\"font-weight: 400;\"> appear, disappear, or change at a specific angle, the flex cable is almost certainly the cause.<\/span><\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Signs_Your_MacBook_Display_Needs_Professional_Repair\"><\/span><span style=\"color: #fe7a01;\"><b>Signs Your MacBook Display Needs Professional Repair<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1960 aligncenter\" src=\"https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Signs-Your-MacBook-needsProfessional-Repair.jpg.jpeg\" alt=\"\" width=\"888\" height=\"436\" srcset=\"https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Signs-Your-MacBook-needsProfessional-Repair.jpg.jpeg 1987w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Signs-Your-MacBook-needsProfessional-Repair.jpg-300x147.jpeg 300w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Signs-Your-MacBook-needsProfessional-Repair.jpg-1024x503.jpeg 1024w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Signs-Your-MacBook-needsProfessional-Repair.jpg-768x377.jpeg 768w, https:\/\/www.lappymaker.com\/blog\/wp-content\/uploads\/2026\/08\/Signs-Your-MacBook-needsProfessional-Repair.jpg-1536x754.jpeg 1536w\" sizes=\"auto, (max-width: 888px) 100vw, 888px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Still have <\/span><b>horizontal lines on MacBook screen<\/b><span style=\"font-weight: 400;\"> even after the six steps detailed above? The next best course forward is to go to a <strong>n<\/strong><\/span><b>earby MacBook service centre such as Lappy Maker<\/b><span style=\"font-weight: 400;\"> for a proper diagnosis and <\/span><a href=\"https:\/\/www.lappymaker.com\/delhi\/macbook-screen-replacement\"><span style=\"font-weight: 400;\">screen replacement<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The lines persist after restarting and updating macOS<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The display problem is becoming more frequent or severe over time<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">An external monitor works normally, but the MacBook&#8217;s built-in display still shows horizontal lines\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The display turns black, cuts out, or changes when you adjust the lid angle<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">You notice uneven backlighting or a \u201cstage lighting\u201d effect along the bottom of the screen<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The issue continues despite basic troubleshooting steps such as restarting, updating macOS, or resetting NVRAM<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">At this point, the problem is almost certainly physical, such as a worn flex cable, a failing display panel, or a hardware fault on the logic board. These need hands-on diagnosis from expert technicians who work with Mac hardware specifically.<\/span><\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Understanding_Horizontal_Lines_on_MacBook_Display\"><\/span><span style=\"color: #fe7a01;\"><b>Understanding Horizontal Lines on MacBook Display\u00a0<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><b>Horizontal lines on a MacBook Air screen<\/b><span style=\"font-weight: 400;\"> and MacBook Pro display are rarely a dead end. The key is figuring out whether you&#8217;re dealing with a software issue, a worn flex cable, or something more serious like a panel or GPU fault.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Start with the simple checks: screenshot test, tilt test, NVRAM reset, external monitor. If those don&#8217;t help, get it properly diagnosed at trusted Mac service centres like Lappy Maker before the problem gets worse or more expensive to fix<\/span><\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Get_Your_Professional_MacBook_Display_Repair_at_Lappy_Maker\"><\/span><span style=\"color: #fe7a01;\"><b>Get Your Professional MacBook Display Repair at Lappy Maker<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">At <\/span><a href=\"https:\/\/www.lappymaker.com\/\"><b>Lappy Maker<\/b><\/a><span style=\"font-weight: 400;\">, Mac display issues &#8211; including <\/span><b>horizontal lines on MacBook screens<\/b><span style=\"font-weight: 400;\"> are something the technicians deal with regularly. With over 40,000+ customers served and a 4.8-star rating, the team has diagnosed everything from early-stage Flexgate to full panel failures.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">What sets the experience apart is a simple policy: no fix, no fee. Before any repair begins, you sign off on what&#8217;s inside your MacBook. Nothing is touched without your go-ahead.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">All repairs use OEM-quality parts, come with up to a 6-month to 1-year warranty, and the service covers Gurgaon, Nehru Place, and surrounding areas in Delhi NCR. We also offer free doorstep pickup and delivery if you\u2019re unable to visit our centre.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Lappy Maker is an independent Mac and Laptop repair centre that\u2019s also ISO certified and recognised by the GOI.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">You can <\/span><a href=\"https:\/\/www.lappymaker.com\/contact-us\"><span style=\"font-weight: 400;\">contact us<\/span><\/a><span style=\"font-weight: 400;\"> or reach the team at <\/span><b>9319848444<\/b><span style=\"font-weight: 400;\"> or E-Mail us at <\/span><a href=\"mailto:service@lappymaker.com\"><b>service@lappymaker.com<\/b><\/a><b>, <\/b><span style=\"font-weight: 400;\">available Mon-Sat, 10 AM to 8 PM.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span><span style=\"color: #fe7a01;\"><b>Frequently Asked Questions<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&nbsp;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_do_I_have_horizontal_lines_on_my_MacBook_Air_screen\"><\/span><b>Why do I have horizontal lines on my MacBook Air screen?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The most common causes are a worn display flex cable, a GPU issue, or a failing display panel. Running the screenshot test and tilt test are good first steps to narrow it down.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_software_update_cause_horizontal_lines_on_my_MacBook_screen\"><\/span><b>Can a software update cause horizontal lines on my MacBook screen?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Yes. macOS updates occasionally introduce display driver conflicts that cause display issues. If the issue started right after an update, a further update or NVRAM reset often helps.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_Flexgate_and_does_it_cause_MacBook_screen_lines\"><\/span><b>What is Flexgate and does it cause MacBook screen lines?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Flexgate is a well-known design flaw where the display flex cable wears out due to repeated opening and closing of the lid. Symptoms include flickering at certain angles, uneven backlight at the bottom, and horizontal or vertical lines.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_I_know_if_my_MacBook_display_flickering_is_hardware_or_software\"><\/span><b>How do I know if my MacBook display flickering is hardware or software?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Take a screenshot. If the lines appear in the saved image, it&#8217;s software- or GPU-related. If the screenshot looks clean but the screen still shows lines, it&#8217;s a physical display issue.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_fix_horizontal_lines_on_my_MacBook_Air_screen_at_home\"><\/span><b>Can I fix horizontal lines on my MacBook\u00a0 Air screen at home?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">You can try some troubleshooting steps such as restarting, updating macOS, resetting NVRAM, and checking an external monitor. But if the issue is a flex cable, T-Con board, or display panel, home repair isn&#8217;t recommended, as the components are delicate and require specialist tools.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_much_does_it_cost_to_fix_a_MacBook_screen_with_horizontal_lines_in_Gurgaon\"><\/span><b>How much does it cost to fix a MacBook screen with horizontal lines in Gurgaon?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The cost depends on whether the issue is a flex cable replacement, full display assembly, or a logic board repair. Lappy Maker provides transparent pricing after diagnosis, with no hidden charges. You can call or WhatsApp <\/span><b>9319848444<\/b><span style=\"font-weight: 400;\"> for an estimate.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Will_my_data_be_safe_during_a_MacBook_display_repair\"><\/span><b>Will my data be safe during a MacBook display repair?<\/b><span style=\"font-weight: 400;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Yes. A display repair doesn&#8217;t touch the internal storage. The SSD and all your data remain completely unaffected during a screen or flex cable repair.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_long_does_a_MacBook_display_repair_take_at_Lappy_Maker\"><\/span><b>How long does a MacBook display repair take at Lappy Maker?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Most display repairs are completed within 1-2 business days once the fault is diagnosed and parts are confirmed. The team will give you a clear timeline after the initial assessment.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Is your MacBook screen showing horizontal lines? The problem can come from several sources, such as a display connection issue, damaged display components, physical damage, etc. In some cases, the issue may be temporary and subside after a few troubleshooting steps, and others may indicate a hardware fault that requires professional repair. This guide explains [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1967,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[315,314,316],"class_list":["post-1958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-macbook","tag-horizontal-lines-on-macbook","tag-horizontal-lines-on-macbook-screen","tag-macbook-screen-horizontal-lines"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MacBook Display Horizontal Lines: Why It Happens &amp; How to Fix It? - The Lappy Maker\u00ae Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lappymaker.com\/blog\/horizontal-lines-on-macbook-screen\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MacBook Display Horizontal Lines: Why It Happens &amp; How to Fix It? - The Lappy Maker\u00ae Blog\" \/>\n<meta property=\"og:description\" content=\"Is your MacBook screen showing horizontal lines? 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