My computer wont turn on for more than half a second

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kocajj

May 9, 2018
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Hi all. I'm trying to build a second computer as a hobby, only problem, is that the computer turns off after less than 0.5 seconds. I've poked around here and elsewhere online, but I've seriously run out of ideas...

Items I've switched out with working components from the other computer and subsequently tested the components that came out in the other computer and work fine.

PSU
Motherboard + CPU
RAM
Internal / External Power Cables
GPU

Yes, I basically switched out the entire computer except the frame, mouse, keyboard, monitor, etc.

Mobo: Asus B250
CPU: Intel BX80677G3930
RAM: 8GB Ballistix
PSU: EVGA 1600P2
GPU: 1080Ti
A lot of this is overkill, but I got some sweet deals on all of these components.


I have tried resetting the CMOS.
I have placed cardboard between the mobo standoffs to eliminate short circuits with the frame.
I have tried different outlets and have tested them with a circuit tester.

Is there something else I am missing? I haven't tried switching the Hard Drive, because it doesnt even get to BIOS.

Note: The frame is custom built (again, hobbying it up)
Note2: I am testing the working computer downstairs of my house and the computer upstairs is not working... I have not tried moving it yet, but I have not idea why that would make a difference...
 
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K

kocajj

May 9, 2018
3
0
10


Thanks for the suggestion! I tried the Mobo and PSU only outside of the frame upstairs and it does work.

After reading my OP, I realized the one thing I hadn't checked was the hard drive, since it wouldn't even turn on long enough to boot to BIOS. I took your suggestion, and then slowly added everything back, cable by cable / device by device and found out the only time I have an issue is when I have the hard drive powered. I plan on sleuthing more, now that I have a causal factor.
 
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K

kocajj

May 9, 2018
3
0
10
After much trial and error, I've determined that the SATA cable that the hard drive was using was causing the issues. Somehow that cable was causing the PSU to trip.

Now that the computer starts... it doesn't boot to BIOS. The monitor just says "no signal".... Any suggestions for the new problem?

Update: I got the BIOS to work... but it wont detect any bootable device, except bootable USBs. If I use any SATA cable, other than the one that "worked" to get the computer into the BIOS, the same problem I started with occurs (the computer shutting off after 0.5 sec).
 
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