PC doesn't start anymore...

Michelbylette

Commendable
Dec 21, 2016
5
0
1,510
Hello, I've got quite a big problem with my pc.
It doesn't boot. I do not have access to the BIOS. Sometimes it shows the splash screen for a second and then black screen with a mouse pointer and a flashing underscore. Sometimes it's just a black screen.
And it restarts by itself after 20 seconds.

I'm sure all my hardware is ok, because once every 100 tries, a BIOS window pops up, then It can boot and my pc runs fine.
No recent hardware changes, no problems, a month ago I shut it off normally, and the next day it wouldn't boot.
I suppose the motherboard to be responsible...

My config :
i7-4790K
Gigabyte GA-Z97-HD3
Nvidia Quadro K6000
Windows 10 Pro

I built it a year and a half ago, never ran into any issues before...
I'd be very grateful if anyone could help me.
Thanks !
 

Michelbylette

Commendable
Dec 21, 2016
5
0
1,510


Nope, nothing in the DVD player nor in any USB...
My HDDs should be working as when it boots everything is fine.
This is quite similar for the blinking cursor, but his pc would boot after 2 minutes, mine just restarts :/

Thanks for helping me !
 

Michelbylette

Commendable
Dec 21, 2016
5
0
1,510


I just found a PSU, but it cannot power all my components, so I tried with just mobo, CPU and boot SSD plugged in. I only got full black screens except for the 2 times I got the flashing cursor...