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Bad Monitor, or Bad Graphics Card?

I have an iMac that is about 12 years old. The monitor started getting streaks a couple months ago, and now I can only see about 1/4th of the desktop. The rest of the monitor is just gray or black with colored stripes (see image below). Is this caused by a bad screen, or a bad graphics card? User uploaded file

iMac, OS X Yosemite (10.10.5)

Posted on Oct 27, 2017 12:16 PM

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Question marked as Top-ranking reply

Posted on Oct 28, 2017 11:29 AM

Bad GPU. Time to retire that machine.

3 replies

Bad Monitor, or Bad Graphics Card?

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