Monitors randomly go dark - won't wake up unless I reboot

Feb 1, 2019 1:27PM PST

I have a self-assembled PC with dual monitors. For the past week, about every 10-20 hours of use, my monitors suddenly go dark and the PC stops responding to keyboard input a few seconds later. Ex: the last time it happened, I was watching a youtube video that I could still pause and start with my spacebar for a few seconds while the screens were dark.

There is no error message and I don't hear any changes from the fans. It's as if the computer goes to sleep. However, the only way to get it working again is to force a reboot by holding down the power button, and then it's fine again (usually for another 10-20 hours).

Any ideas? Happy

Post was last edited on February 1, 2019 1:27 PM PST

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Feb 1, 2019 2:17PM PST
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Had a similar problem
Feb 1, 2019 8:28PM PST

In my case it eventually turned out that the video driver would crash after a while and somehow failed to restart. Often the computer would keep running and I could still access it or its disk drives remotely.

In your case it seems the crash brings down the rest of the system eventually.

So the first suggestion would be to try an upgrade of the video driver. Or could there be something wrong with the cooling of the video card/chip?

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