Question PC restarted after what not booting in anymore

[lightc]

Hi there,

My PC restarted and is not booting back on anymore, it played up a bit lately where randomly restarted with a blue screen and then turned back on, but now- it just stopped and after the restart, no picture nothing. Motherboard says error 90, which I found is "Boot Device Selection (BDS) phase is started", removed all drives, cleared CMOS (through the back button), nothing- it just stays there on error 90 without a picture. When removing all RAM from a computer, it then stays on code 0D. Dunno where to go next- RMA motherboard or there's anything I can do before sending it out?

System specs:
MSI Meg X570 Ace
3900x
4x Ballistix RAM sticks: BLE8G4D36BEEAK.M8FE1
Radeon RX 5700XT

It worked all fine up till last week it randomly restarted and now yesterday it once restarted, then it booted in and worked fine again, then restarted without a blue screen or so and is not booting in anymore.

Any help appreciated!

 

[Roland Of Gilead]

It's possibly your PSU. Normally re-starts like that are PSU related. What PSU do you have?

 

[lightc]

It's possibly your PSU. Normally re-starts like that are PSU related. What PSU do you have?

Corsair HX1000i, I have another PSU at home (which I know is perfectly fine), I could test it out, but do you think this issue is PSU related? Would computer even start if there was an issue with the power supply?

update:
connected other PSU and same thing, code 90