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Computer won't boot properly with multiple displays attached.

226 views 3 replies 2 participants last post by  makecoldplayhistory 
#1 ·
If I boot my PC with multiple displays plugged into the GPU, it turns on properly but won't take the screens out of standby. I can't manually take the screens out of standby in this scenario.

If I unplug the monitors and plug them back in once the PC's booted it's all fine.

If I have 1 display plugged in then it all boots properly and I can plug the 2nd and 3rd monitors in.

I have 2 HDMI and 1 DVI-D monitor. Any of them (if one and one only) work properly for booting but any 2 of them stops any kind of display.

The computer seems to run fine - no freezes, FPS drops or similar to suggest PSU or GPU issues.

I've updated drivers, checked cables are pushed in firmly to monitors (power and data) and all connections inside the tower.

Thanks in advance
 
#2 ·
Rig specs are well out of date.

AMD 6350

Win 10.

GTX 660.
 
#3 ·
Try playing with the CSM settings in BIOS.
 
#4 ·
No. What in particular? Just try enabled or disabled and see if it works?

I haven't changed anything in UEFI for months (except for a stable, low OC, removed at the moment for troubleshooting this issue) and the computer's booted with no problems.
 
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