Question Is my CPU or Motherboard dead?

[DjAjX]

Hi, few days ago I've plugged on my T150 (a racing wheel) and it made a shortcut (on the wheel, not the pc). When I plugged the home light on again I've booted up my pc as nothing happened and it won't boot. It keeps on CPU red light error on the motherboard.
I've tried clearing CMOS. Nothing.
Unplugging RAM and testing all DIMMs. Nothing.
Tried without the GPU. Nothing.
Changed the 8pin CPU connector. Nothing.
The PSU works doing the trick with the paperclip.
The CPU and the Xipset gets hot, so I guess it receives power. So I'm quite confused of what's happening. I don't have access to test other CPU and other Motherboard yet (a friend is gonna give me his motherboard and CPU to test).
Also sadly I don't have anything to test voltages.
So what could it be?

PC specs:
Motherboard: ASUS B450-F Gaming
CPU: Ryzen 5 5600X
RAM: 16 (2X8) 3000mhz, Corsair vengeance RGB pro
PSU: EVGA GQ 650W
GPU: RTX 3080

Thanks and sorry for my bad English.

 

[Lutfij]

Tried without the GPU. Nothing.
The processor you own doesn't have an iGPU. You won't get any display output from the motherboard, unless you have an APU for the AM4 platform. You're going to need a discrete GPU to get display output.

The PSU works doing the trick with the paperclip.
The paperclip method is a failed test, it doesn't tell you how much power the PSU can effectively output.

PSU: EVGA GQ 650W
GPU: RTX 3080
How did you manage to power that entire build with a 650W unit? You're advised to have a reliably built 1KW PSU to power a rig with an RTX3080 in it(due to transient load spikes).

Motherboard: ASUS B450-F Gaming
https://dlcdnets.asus.com/pub/ASUS/...MING_UM_WEB.pdf?model=ROG STRIX B450-F GAMING
Turn to page 3-26, section 3.11.3 and see if you can reflash the BIOS with the latest version to revive your motherboard.

Might want to carry over your processor over to a known working motherboard(at a friend's or neighbor's house) with the right BIOS version to support your processor and see if the same issue persists there. If it does then the CPU's gone...or the entire build might've croaked.