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Hi I have IMAC 21.5in A1418 Year 2013 with black lines on the screen. Is there any quick fix? If not do I need to replace LCD or can it be fixed? Is it LCD or graphics card? Please help me in sorting his out. Thanks Kaz
Black lines are bad TAB connections (TAB error). It sounds like someone had difficulty taking the display off when trying to open the system. Sadly, there is no means to fix this damage. You’ll need to replace the full display assembly 2013 21.5” iMac Display Assembly, Apple P/N 661-7109 (Used) $440 USD. You’ll also need this kit: [linked product missing or disabled: IF173-005-1] and here’s the guide you need to follow to properly remove the display iMac Intel 21.5" EMC 2638 Display Replacement
