Question AsRock AB350M Pro4 will not POST after CPU upgrade

Feb 19, 2019
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Upgraded a system from a Ryzen 5 1400 + 1050ti to a Ryzen 5 2600 + rx 580. The GPU works great, but when I put the new processor in, the system does not post. No beep codes from the motherboard, no video, and boot does not complete -- no lights on the USB keyboard.

If I swap back to the original CPU, all works well, including the new GPU. System does not POST in any configuration with the 2600 -- new GPU, old GPU (a zotac 1050ti), or no additional GPU (on-board graphics).

I RMA'd the CPU with Amazon and this happens with the second 2600, so I don't think it's a problem with the processor. Any ideas what the problem could be before I buy a new mobo?

Thanks!
 

punkncat

Champion
Ambassador
Read through the BIOS info to see if there was a bridge BIOS or driver update that needed to be installed along the way. Seems like I recall reading about my previous ASRock needing an updated driver pack prior to the upgrade.

"
Update AMD AGESA to 1.0.0.6.
  • Please install "AMD all in 1 with VGA driver ver:18.10.20_NHDA" or a later version before updating to this BIOS.
  • If the current BIOS version is older than P3.60, please update BIOS to P3.60(Bridge BIOS) before updating this version.
  • If you updated the BIOS before updating the AMD all in one driver, please refer to the Display recovery SOP to recover your system."
 
Feb 19, 2019
6
0
10
Read through the BIOS info to see if there was a bridge BIOS or driver update that needed to be installed along the way. Seems like I recall reading about my previous ASRock needing an updated driver pack prior to the upgrade.

"
Update AMD AGESA to 1.0.0.6.
  • Please install "AMD all in 1 with VGA driver ver:18.10.20_NHDA" or a later version before updating to this BIOS.
  • If the current BIOS version is older than P3.60, please update BIOS to P3.60(Bridge BIOS) before updating this version.
  • If you updated the BIOS before updating the AMD all in one driver, please refer to the Display recovery SOP to recover your system."
Thanks. I updated to the bridge and installed the driver pack prior to going to 5.5
 
Feb 19, 2019
6
0
10
Have you cleared CMOS after BIOS update? Use the jumper or remove the battery.
Do you have a speaker attached to the motherboard? I wasn't aware that the AB350M has an inbuilt one.

It's got a little 2-wire speaker connected to the board. Got beep codes with the GPU removed, so it appears to work.

Clearing the CMOS shortly.
 
Feb 19, 2019
6
0
10
The system will not boot with the Ryzen 2600 in any configuration, including a single memory module and a 1050ti, which is easily within the system specs.

The PSU should be fine for boot.