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[Clydefrog]

GAF! Can you help? My PC is not working but I don't know why or what may be broken. I was using it fine the other day; I shut it down for the night and then when I tried to turn it on the next day it would not even start up! I pressed the power switch but nothing happened.

I decide to unplug it from the wall, open it up, and fiddle with some wires. I did that and, voila, it started up! Although, it directed me straight to the BIOS setup because it could not find any bootable devices. I have a SSD and a HDD and they're both not showing up in the BIOS screen. I try to boot using a Windows 10 USB flash drive but it just goes to a black screen and then resets to the BIOS screen.

I tried taking components out (GPU, RAM, etc.) and I got the earlier result of the power switch not even working. However, I know the mobo is getting power because I can see the green LED light lit up. Also, when I plug my mouse in to a USB port, I can see its LED light up. I even tried removing the CMOS battery on the mobo with a brand new battery.

So basically my computer now either 1) doesn't boot up at all or 2) boots up to the BIOS but doesn't find any of my SSD or HDD. The PC is nearly 2 years old with a 1 year old PSU (earlier PSU died). I'd find it hard to believe I have another PSU that only lasted a year? I'm guessing it is probably the motherboard at fault here but I was hoping GAF might have some ideas before I take it to my local computer repair shop. Thanks

My specs:
ASUS Z170-A motherboard
Intel i5-6600K CPU
Coolermaster V750 750W PSU
16GB RAM
GTX 980Ti video card

 

[LelouchZero]

It sounds like a motherboard issue or the drives aren't getting enough power. Do you have another computer to check to see if the drives are alright?

Maybe a bios update could help, or try switching around the SATA data ports the drives are connected to.
Also, try using different SATA data and power cables if you haven't already.

 

[Goo]

Try one drive at a time see if bios reads them; also try alternative sata ports on the motherboard for each drive. I assume removing the cmos battery reset the bios, but try resetting to default just in case a setting is causing trouble.

 

[curiouscharles]

yeah, only way to figure out what it is is process of elimination [so trying all the devices on other computers / mobos to see if it's indeed the mobo or PSU].

which can be... hard, if you don't have a spare old PC around.

i'd honestly just take it in to your local spot, i don't have an old PC to swap / test parts anymore and when shit like this happens it's like 25-50 bucks to fix [plus i support a local biznassty].