Question Computer turns on with no signal, restarts automatically after about 10 seconds, then stays on with no signal

Apr 2, 2020
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One morning my computer wouldn't turn on properly out of the blue. The computer would either start up and restart over and over again, never sending any signal to the monitors. Or it would turn on and restart after about 10 seconds, remain on but with no signal to the monitors.

I bought a new PSU with the same Wattage as my previous but the problem persists.

I have tried booting the system with one monitor plugged into the motherboard's onboard graphics with the same problem.

The computer has 2 different sets of 2 RAM sticks (as in I have bought 2 packs of 2). I have tried removing one set, leaving the other set in, and tried the same with the other set. The problem still persists.

I have run the computer with the bare minimum, unplugging the discs, unpowering the graphics cards. The problem still persists.

Does anyone know what could be wrong or any more troubleshooting I can do.

Thanks

Specs:

PSU: ATX switching power supply ATX-500B
Motherboard: Asus PBZ77-V LX2
CPU: Intel Core i7-3770
Case: Zalman ATX Mid Tower Z11 Plus
 
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