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Hi all,
is there any way to fix this?
OK I managed to make the external display work: the imac was running Linux, and the second screen attached to the mini displayport through an HDMI adapter get no signal. So I created a Mac OS X installation boot usb stick and booted by USB. When running the OS X installation program, the second screen attached to the mini displayport was running fine.
Therefore I think the problem is in the screen.
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If the external monitor shows a clean image then you will need a new display. Follow this guide iMac Intel 27" EMC 2639 显示器更换 and here’s the needed part 2012/13 27” iMac Display Assembly, Apple P/N 661-7169
这个答案有帮助吗？
External monitor attached to the minidisplay port with a mini displayport to hdmi adapter says no signal.
@golivag - Not good ;-{ Your logic board has issues!
It might be repairable but its going to take someone with deeper skills and access to the needed tools to fix this. Or, you could just replace the logic board TheBookYard UK - Possible logic boards that will work in your system for one source that should have what you need.
Well, your new test point to the display which is what I had thought!
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Does anything happen if you connect an external display?
由 Andrew S 完成的
External monitor attached to the minidisplay port with a mini displayport to hdmi adapter says no signal.
由 Gennaro 完成的
@golivag - Your new test proved the internal display is bad, time for a new one.
Please score and accept my answer - Thanks!
由 Dan 完成的