Computer not turning on- 3 weeks old build

stevex9

Reputable
Jun 11, 2015
9
0
4,510
Hi,

Yesterday when I tried to turn my computer on, nothing came up so I went step by step to try and diagnose the issue doing the following:

1.- Tried another electrical outlet, nothing.
2.- Reviewed the cables, connections,etc to look for something that might have gotten unplugged.
3.- Tested the psu with a paperclip outside the build and it slightly turned on.
4.- Tried another psu (new one) and nothing. I did the same paperclip test and the new psu was working just fine.
5.- I removed the build from the case and left only cpu, ram and the necessary connections to the psu (went breadboard). Tried turning the pc on with a screwdriver on the 2 power pins from the mobo. Nothing still
6.- Tried switching ram and nothing still.

I only had 2 days left before the mobo warranty expired so I went ahead and sent it for refund and bought a new one.

I am a fairly experienced computer builder but I'm not a hardware expert. Overall I'm following the principle that if nothing comes up, it's either the psu, mobo or cpu, last one (cpu) being really unlikely. Since no fans or lights or anything come up, I believe the mobo may have gone bad completely or shorted (no burnt smell or signs of it though)

My build is the following:

CPU: Intel Core i5-4590 3.3GHz Quad-Core Processor
Motherboard: ASRock H97M-ITX/AC Mini ITX LGA1150 Motherboard
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1600 Memory
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive
Video Card: Gigabyte GeForce GTX 970 4GB Video Card
Case: Cooler Master Elite 130 Mini ITX Tower Case
Power Supply: EVGA SuperNOVA GS 550W 80+ Gold Certified Fully-Modular ATX

My questions are the following: From experience, would you think that the cpu went bad instead of the motherboard? And if it's not the mobo, is there a chance that the cpu might have been affected too?
 

stevex9

Reputable
Jun 11, 2015
9
0
4,510


With the paperclip trick, the fan was turning on for 1-2 seconds then turning off, that's why I thought it might not be working completely. The second psu is a corsair cx750m and that one fully turns on when using the paperclip trick.
 
I would first guess it was the mobo being small size. Normally they have a higher rate of failure. Logically something is telling me this is what the issue is. I hardly ever hear of CPU failures in this case, never hear of that PSU failing. And nothing else matches the issue.
 

stevex9

Reputable
Jun 11, 2015
9
0
4,510


Yeah, seems like that. Just weird that it happened just 3 weeks of slight use and no changes on anything.