[SOLVED] Monitors not being told to wake up?

[TsukiZero]

Just this week (Wednesday, to be more precise) I started getting this weird situation where the monitors won't wake up when powering on the pc until I either:

• Turn the PC off and back on or;
• Power off the entire power strip or;
• Use a VGA cable to connect one of the two monitors to the onboard's VGA port.

And the last method is rather weird thing: it allowed me to peek into the BIOS and see the BIOS is fine (so, not CMOS Battery issue); allowed both monitors to immediately wake up after leaving the BIOS, and none of them are acting weird, and the dedicated GPU is functioning just as it should.

Any other leads, or should I stick with the VGA lifeline to wake them up?

 

[rgd1101]

full system spec? include brand and model of the psu

 

[TsukiZero]

BIOS Version/Date: American Megatrends Inc. P1.00, 10/5/2015
SMBIOS Version: 2.6
BaseBoard Manufacturer: ASRock
BaseBoard Product: N68-GS4 FX R2.0
Graphics Card: Palit Geforce GTX 970
Nvidia version: 516.94
OS Name Microsoft Windows 10 Pro
Version 10.0.19044 Build 19044
Total RAM: 8 GB

PSU is a onePower 500w high efficiency with 4 SATA, 2 IDE, (IIRC one of which is being used as 1 PCI-E via an adapter, since the Graphics Card needs two PCI-E), 1 ATX 12V 4+4 V.2.3, 1 PCI-E. This PSU is the newest component of all, bought this year to replace the PSU that died around April or May. Been doing a swell job.

I'm suspecting the problem is with the monitors or the graphics card, since it is possible to make them wake up by using the VGA cable trick. But if it were the graphics card, then shouldn't it have been impossible to use the two monitors since one is using its HDMI port and the other is using the DVI-E right now just fine?

Worth noting the Reliability History shows no warnings nor errors as of late (except forced shutdowns because I was an idiot thinking the PC didn't start when it actually did.)

Next time I might try CTRL+SHIFT+WIN+B to see if that also works.

Edit: It happened again, the key combo above did nothing, BUT because the VGA cable was in I was able to switch and see it wasn't passing through the Graphics Card but rather onboard. Assumed it was the Graphics Card being a bit loose, opened the case, gave some light dusting, applied contact cleaner on the ports and contact that are used with the graphics card, reseated it in, worked first try.