Points square on the screen, but it doesn't seem to be a GPU failure
Hello. When El Capitan (last) tried to wake up from its sleep it won't but I used the power button to wake him up, when he made these points there. The system froze. I hard rebooted the screen is split in two. I hard rebooted again, they were left, so I did the LANDAU and SMC restores the points place after a while came back (sometimes lines, sometimes the screen would split screen). I removed the adaptor for the second monitor. After doing all this when I started out on a disc USB external (Snow Leopard), the points appeared again a few minutes.
I did a lot of tests and everything past that. All on their default test setting: on Windows 10: Prime95, GPUtest, sky, Speedfan for the hard drive. On OS x: AHT (the one by which you press D, which has been tested 3 times), Cinebench and disc utilities. Usually when the CPU or GPU, within minutes the points and the screen becomes scrambled in minutes, but there seems to be nothing wrong with the material (late 2009 iMac, make / batch of March 2010). On Windows, Boot Camp 10, everything was fine, no square points.
This could be a software problem (corrupt kernel I read on some forums could lead the points). Now it has been hours after I did the test and resets, it's normal.
Extensive tests show that the material is good:
Thank you in advance. God bless you. Revelation 21:4
Start in Safe Mode, Mac OS x: Safe Mode bootand see if you get the same problem there. If she does not repeat is to log on to another user on Mac account and check there.
However, it looks like a GPU card failure.
Tags: Mac OS & System Software
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