I'm building a system with the following spec:
MB: Asrock A320M Pro4
CPU: AMD Ryzen 2400G
Memory: Corsair Vengeance LPX CMK16GX4M2B3000C15
SSD: ADATA SX800/960GB
Power supply:650W
Monitor attached to onboard VGA port. System appears to start OK, and goes into BIOS settings after pressing f2 on keyboard. Temperatures all seem OK on bios screens. After about 15-20 seconds the screen goes blank, but PC appears to stay running (fans still on, power light on).
Pressing the power button for 5 seconds, to turn off, and then turn back on, now the PC appears to start (fans & lights), but nothing appears on screen, and after 15-20 seconds the PC restarts, and it continues going through the statup/reboot cycle.
Leaving the PC for a few hours, and I can go back to a proper boot and see the BIOS screen again (for a few seconds).
The only beeps from the motherboard speaker are a single beep as it goes into BIOS settings. No other indications of errors.
I've reset the BIOS, but no change.
I've removed both RAM sticks, and I don't even get warning beeps on system start, which seems strange.
I don't have access to any similar components to swap out, so really not sure what's at fault here. Any advice for how I can try and diagnose the problem?
MB: Asrock A320M Pro4
CPU: AMD Ryzen 2400G
Memory: Corsair Vengeance LPX CMK16GX4M2B3000C15
SSD: ADATA SX800/960GB
Power supply:650W
Monitor attached to onboard VGA port. System appears to start OK, and goes into BIOS settings after pressing f2 on keyboard. Temperatures all seem OK on bios screens. After about 15-20 seconds the screen goes blank, but PC appears to stay running (fans still on, power light on).
Pressing the power button for 5 seconds, to turn off, and then turn back on, now the PC appears to start (fans & lights), but nothing appears on screen, and after 15-20 seconds the PC restarts, and it continues going through the statup/reboot cycle.
Leaving the PC for a few hours, and I can go back to a proper boot and see the BIOS screen again (for a few seconds).
The only beeps from the motherboard speaker are a single beep as it goes into BIOS settings. No other indications of errors.
I've reset the BIOS, but no change.
I've removed both RAM sticks, and I don't even get warning beeps on system start, which seems strange.
I don't have access to any similar components to swap out, so really not sure what's at fault here. Any advice for how I can try and diagnose the problem?