[SOLVED] PC not posting after installing a new CPU

[en42ss]

Hello,

As title reads, I have problems after installing a new CPU...

MOBO: GA-A320M-S2H
CPU: AMD Ryzen™ 5 5600G
RAM: VENGEANCE® LPX (1 x 8GB) DDR4 2400MHz C16

It's my wife's PC, and this is the 3rd CPU I have bought for her system since 2018.
I started out with a 7th Gen A8-9600 and continued with an AMD Ryzen™ 3 3200G .
I have also made several changes to my PC, so not a fist timer in CPU swapping.

I think I have done everything correct, and checked thrice, but still can't make the PC post when the new CPU is installed.

According to Gigabyte, the 5000g series is supported after F55 Bios version.
I flashed the mobo from F40 to F56a and boot smoothly into windows, so the flashing was a success.

The system is only having an M.2 SSD and an optical drive connected, so no extra devices that could create conflicts exist.

I have also swapped the Ryzen 3 and Ryzen 5 three times with the same results.
PC boots windows with the old one, and doesn't even post with the new one.

There are no damaged/bent pins or dust on the new CPU.
Any ideas on what could be the problem?
Cause at the moment, all I can think of is that I received a D.O.A part (which is kind of rare for a CPU)

 

[rgd1101]

fan still spinning? and just no video output?

 

[en42ss]

fan still spinning? and just no video output?

Well at some attempts fan keeps spinning. But there have been several times when the fan stopped spinning in 1-2 seconds.

At the moment I've put back the old CPU and system works just fine

 

[rgd1101]

go back to bios and see if it did update the bios version?
what cpu cooler are you using?

 

[en42ss]

go back to bios and see if it did update the bios version?
what cpu cooler are you using?

Already checked bios version. It has updated to F56a. As for the cooler, I’m using the stock one tha came with the CPU.

 

[rgd1101]

return the cpu.

 

[DRagor]

Have you reset CMOS after BIOS update?

 

[en42ss]

Have you reset CMOS after BIOS update?

Yes, I have

 

[DRagor]

Last ditch effort would to downgrade BIOS to F55. If that does not help, looks like DOA CPU.

 

[en42ss]

Last ditch effort would to downgrade BIOS to F55. If that does not help, looks like DOA CPU.

Thanks. I will try that and see what happens…