OSX suddenly stopped and restarted but does not restart. Lines of color on the screen

Hello

I'm on OSX 10.10.5 (I think) at least, I use EL Capitan. I can't tell the exact version, because my computer does not start correctly. The software is installed on an I mac for some time around mid-2011.

The day began like any other day. I turned on the computer. Opens the web browser and lightroom. All of a sudden my screen turned gray and my second was a line downwards in the Middle, almost as if two screens of office have been posted on a monitor. Screens flashed several times with some funky patterns and then the system restarted with a carillon.

When he did, white vertical bands turned towards the bottom of the screen while the Apple was displayed at startup. Sold turned screen gray, then rebooted again. This time, the bands were purple. It's the same thing again but next time the lines were orange and the system restarted a third time. At this point, I turned the computer off and tried again, but I was immediately greeted with several orange bands.

Can someone help me find a solution or help me pin point the problem?

From what you describe, it looks like a hardware issue that Apple will only be able to resolve, but not to despair immediately.

Read it please get help with graphics issues on external displays connected to your Mac - Apple Support.

I know that the title and subject are not suitable to your concern, but buried in this document is the following passage that contains three links describing the steps to follow.

If you can not change the resolution of your screen because you see no image, restart your Mac in safe mode to reset the default display resolution.

If booting safe mode doesn't resolve the problem, reset your Mac NVRAM and SMC to reset the video ports on your Mac to their default values.

That first, then write again for additional suggestions if you are still having problems.

Tags: Mac

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