Question Ryzen CPU won't POST

[H2OPOK]

Hi,

a dead looking CPU got into my hands. It won't POST, there is just a black screen while the fans are spinning, but(!) the CPU is warming up after the computer is powered on.

The motherboard's BIOS supports the CPU and also other parts do work because if the CPU is replaced by another one then the system boots up as normal.

I don't see any bent pins.

Since the CPU is warming up I suspect that it could be resurrected back to life.

Any ideas about the root cause of the problem and a possible fix?

 

[Hitman928]

Hi,

a dead looking CPU got into my hands. It won't POST, there is just a black screen while the fans are spinning, but(!) the CPU is warming up after the computer is powered on.

The motherboard's BIOS supports the CPU and also other parts do work because if the CPU is replaced by another one then the system boots up as normal.

I don't see any bent pins.

Since the CPU is warming up I suspect that it could be resurrected back to life.

Any ideas about the root cause of the problem and a possible fix?

Just because the CPU is warming up (hopefully you tested by checking the heatsink temperature) doesn't mean the CPU isn't dead. The CPU could still power on but the logic could be toast.

With that said, what board and CPU are you testing and what bios version are you using?

 

[Dave3000]

What speed of RAM do you have?

 

[H2OPOK]

What speed of RAM do you have?

2133 MHz

 

[DAPUNISHER]

Are you clearing CMOS when swapping?

 

[Zucker2k]

With that said, what board and CPU are you testing and what bios version are you using?

This. Unless you mention which CPUs you're talking about and board bios version, no one can give you a conclusive answer since bios updates are needed to work from generation to generation.

 

[H2OPOK]

Are you clearing CMOS when swapping?

Of course, I'm not an amateur.

This. Unless you mention which CPUs you're talking about and board bios version, no one can give you a conclusive answer since bios updates are needed to work from generation to generation.

I also tested the CPU with all 4 ram slots individually, no luck.

Could it be that the soldering of a pin gets loose (due to heat) and the contact breaks?

 

[richierich1212]

What CPU model? Motherboard? Bios version?

 

[chrisjames61]

Defective out of the box cpu's are rarer than hen's teeth. I am assuming this is a used cpu? Also a defective cpu can get warm.