Failing CPU, bad mobo, instability, or PSU problems?

Apr 23, 2018
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So I recently bought a new motherboard due to a failure on my old motherboard. The new motherboard works and everything works out fine but if it’s left on for awhile everything stays powered like the mobo, gpu and all fans, but I’m hit with no signal from my monitor, usb devices are unresponsive and not even the power button on the case responds. I’m worried that my cpu has been damaged during the failure of my previous mobo. I tried stress testing the cpu and this happened in about 30 seconds but cpu temps never went above 55 Celsius.

My specs:
Ryzen 5 1600x
Asus rog strix b350-f
Evga Gtx 1070 ftw
Fata1ity 550w psu
16gb G Skill Trident Z 3200 (2x8gb)

Main worry is cpu failure but no response from anything on the mobo like the power button makes me think it could be a problem with the board. Also in the bios I can’t get my RAM to stay stable at anything higher than 2133 MHz when on my old mobo it could reach its full 3200 MHz so could it just be an instability issue? Bios is fully up to date on the Asus board. I’m currently RMAing my old board (ASRock ab350 pro 4) so I hope to rule out or confirm any motherboard defect with that. Thanks for any ideas. I don’t have any sort of speaker plugged into the mobo so I can’t analyze any beep codes.

Update: So I noticed yesterday that my motherboard was sending too much voltage to the cpu which could be the reason for the instability. I’ve tried changing the Vcore in the bios but no matter what I set it to it doesn’t seem to care and pumps as much voltage as it wants. I really don’t want to turn my pc on because voltages we’re getting up above 1.5v and if my cpu isn’t the problem
I don’t want to damage it
 
Solution
At this moment could be anything but while waiting for MB maybe you could check PSU and pull out RAM and GPU to check for any beeps from POST.