BAD PSU or Motherboard?

GentlemanBaker

Commendable
Sep 24, 2016
2
0
1,510
So about a month ago my computer was on during a storm. it was just raining so I didn't think anything of it plus it was on a surge protector. Then we had a power loss (lasted about 30 seconds). I do not believe it was a surge but I honestly cant be 100% sure (surge protector said it was still protected). latter that day my computer randomly shut off and then turned back on. I thought it weird but thought that it might have just been another short brown out. Well, it started doing it more frequently until it would just get stuck in an endless attempt to start up (would get half way through the boot process and then restart it). I did some research and most of the signs pointed to the motherboard having been fried. I did bead boarding and nothing else appeared faulty. So I got a new motherboard, a UPS (which i didn't have before), and a PSU tester. The PSU tester (DR Power II) told me that everything was giving the correct voltage, so I installed the new motherboard.

I've had the new Motherboard in for about 3 weeks and everything has been going great. Until last night when I started getting bad voltage warnings from ASUS Suite II. That program has been known to give bad readings so i checked it against HW monitor and it said everything was fine. Then, about 5 hours latter, my computer randomly shut off on me and restarted in safe mode. I started to trouble shoot and about 10 minutes latter it shutoff again. Then it started with the endless attempts to boot and then restart again. Also, my pump for my water cooler maid a really weird noise about the 3rd try. The only other thing I can think of is a bad PSU, but that seemed to check out last time. Any Ideas on what the problem is? Would it be possible that a bad PSU could have fried my new motherboard?

Here are the Specs on my PC

Roswell Sthealth Case
ASUS Crosshair V Formula Z Motherboard
Gigabyte Geforce GXT 970 graphics card
G. Skill trident X DDR3 2133 ram (16G)
FX8350 AMD CPU
EVGA 850 G2 supernova (80 plus Gold)
Corsair H80i v2
ASUS duleband wireless PCI adpter
Cyberpower 900W battery backup
 

GentlemanBaker

Commendable
Sep 24, 2016
2
0
1,510
So, I figured it out. My PSU wasn't dead but rather dying. When testing it for the 2nd time with my multi-meter, on the 13th run through my 12v pin on my motherboard connector dropped to 0, then came back up, then dropped back to 0. It did this on the next 3 tries also. So, while I didn't catch it the first time, I got it now. thanks for the help guys.