No signal to monitor and keyboard disabled (black screen)

DJ_Andrew_151

Prominent
Jul 24, 2017
3
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510
Ryzen 5 1600x
GTX 970 WF OC 4GB
16gb 2400 Mhz DDR4
ASUS Prime B350 Plus

Re-installed Windows
Re-installed all newest Drivers
Flashed Newest Bios
Swapped Video Card (Same card model)
Swapped PSU
Reset CMOS

I'll add steps as I can remember them. I've spent a good 3 days troubleshooting this issue, and I am at wits end.

Everything started with some BSOD issues, I would get alternating crash codes. Memory_management, and IRQL_Driver for xHCI

This is what primed the re-installation of windows.

With a different card in and a new PSU, fresh windows with all updates and current drivers installed, I can't pinpoint anything that would cause this black screen to continue occurring.

The monitor will lose signal source and the back-lit keyboard lights will go out. This has happened while running benchmark software, browsing the web, gaming, or at any other task, with no warning or repeatable process. Temps all check out, voltages are nominal, and resource usage is appropriate for whatever given task is being performed.

Days of troubleshooting and google searches have yielded no improvement.

Someone, somewhere must have some insight into this.

Help me Obi Wan Kenobi, you're my only hope.
 
What do you mean temps check out? what are they? how do you know they're not at dangerous levels when the crashing occurs?
What PSUs specifically?
Have you tried swapping ram/using only 1 stick? those error codes sound like problems with the ram. Maybe you put them in the wrong slots? (should be in the grey ones)
 

DJ_Andrew_151

Prominent
Jul 24, 2017
3
0
510


I've been using HWMonitor to keep an eye on everything

GPU temps are <65c under load and 33c idle
CPU Temps are <50c under load and 30c idle
I have not swapped in/out any RAM modules
They are currently installed in the grey slots
Image here:
https://drive.google.com/open?id=0B7t3QRFmx9wZNUxfeEpUYXU2bDg
 

DJ_Andrew_151

Prominent
Jul 24, 2017
3
0
510


I used Aida64's test instead (Is there a difference?)
Let the mem test run for about 15 minutes, nothing happened
CPU test rendered the same lack of result
I got a false positive on one of 3 FPU tests
I ran the Cache test and, so far, I have a repeatable failure within 1 minute of starting the test
Temps don't rise above 40c

Update: 5/5 Cache tests have created the same result