Computer turns on without beep, after 30 seconds turns off

Ziga__

Commendable
Dec 30, 2016
1
0
1,510
I have changed my graphic card and computer case. When tried to power it up, it turns on with all 4 phase led lights, there is no beep sound for bios. Depends on the try i can reach bios for around 20 seconds or while booting it just shuts down at windows sign...

I have allready tried unpluging everything except power cables to motherboard and is still the same.

Should i restart the BIOS?
 
Solution
It could be anything, but most likely a power failure. Can you check your voltages in BIOS? Also, check all power cables and the CMOS battery are fully attached/inserted.