iMac screen Corruption and gel

My iMac late 2009 El Capitan 10.11.2 running Gets the corruption of the screen and freezes. None of the buttons work, but the mouse still moves. The only solution is to reboot. Now it is reliable if crush every 5 minutes or more. Safe mode doesn't fix it. See the image of corruption. No idea what it would be appreciated.

You should run the Apple Hardware Test Disc two of the grey TV original installation, see if it reports a failure.

Tags: Mac

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