Dead mobo or CPU?

[Stoly]

So I'm checking a friend's PC that won't boot.
Its a gigabyte B550 mobo coupled with a Ryzen 5 5600G

The pc will turn on, fans will spin, but it won't boot, I tested the ram PSU,, SSD and videocard separately and they all work fine. Thing is the CPU will not get hot at all, also the PC won't turn off with the on/off button after 5+ seconds, I have to switch off the PSU.

Unfortunately, I don't a spare mobo or CPU to test which one is faulty.

I tend to side with the mobo since CPU deaths are rare, the CPU Heatspreader was quite dusty, but I've seen worse.

Thoughts? recommendations?

 

[Grimlakin]

So I'm checking a friend's PC that won't boot.
Its a gigabyte B550 mobo coupled with a Ryzen 5 5600G

The pc will turn on, fans will spin, but it won't boot, I tested the ram PSU,, SSD and videocard separately and they all work fine. Thing is the CPU will not get hot at all, also the PC won't turn off with the on/off button after 5+ seconds, I have to switch off the PSU.

Unfortunately, I don't a spare mobo or CPU to test which one is faulty.

I tend to side with the mobo since CPU deaths are rare, the CPU Heatspreader was quite dusty, but I've seen worse.

Thoughts? recommendations?

Wait the heat spreader was DUSTY like dust settled on it? Good lord the throttling. Could be CPU OR Motherboard but I would lean to mobo as well.

 

[Denpepe]

Any debug LED's on the mobo? I would think mobo first but I seen in some repair vids that ryzen CPU's do die (seen 3 or 4 dead ones in around 20 vids orso)