This got my hopes up and I was able to initiate a bios flashback which ended after ten minutes with three long beeps.
I’m not sure what means, usually three beeps means memory. So I installed memory and cpu.
I’m able to boot the system if I disconnect power and remove the bios battery but it powers off after a few seconds and doesn’t turn back on again unless if I cut power for another 5 mins and then the same thing repeats.
Yes, was going to suggestion this. The last I checked it was around 350 rupees for diagnosis for B450 mobo. You have to add shipping cost to that if the service center is not near you.
It seems like tripping a hardware power fault when DRAM/SoC rails start up (very likely a bad VRM stage or its control/sensing circuitry). This is most probably not a BIOS problem.
Unplugged PSU then power drain MB. Measure resistance to ground on the DRAM VDD rail and the SoC rail. If you get single-digit ohms it’s likely a shorted MOSFET or shorted load. If you get tens of ohms or more it’s likely a VRM controller/power-good/current-sense failure.
Either way, it seems a hardware level fault and not fixable without rework. Better get it RMAed if you don’t want to buy new one.
MSi has some special test software to check if their motherboards are working correctly. I tried searching for it on the internet but had no luck.
These are pics they sent to me when I sent my mobo in because it was not keeping time even with a new battery. Turned out that the quartz crystal had to be replaced in my case.
That means you were effectively bypassing the CPU PCIe root complex path. That support my understanding of a failing SoC/CPU-side power or signalling path on the motherboard
(not chipset, GPU or CPU).
AFAIK it’s MSI’s internal factory/production test tool, used for factory and refurb validation. You (most probably) won’t find any publicly available download.
Update, I read a post on reddit where someone had the same problem, cpu debug led with a 5600G with this exact motherboard. Changing the ram had solved the problem for them.
I lost an MSI B450M PRO-VDH a few years ago with the CPU debug LED popping up after I had cleaned the system (I think? Not sure.). I replaced my Ryzen 5 1600 with a 5600x, thinking it had gone kaput, but no luck, as the terrifying LED remained. Ended up replacing the board, which worked. I gave away the mobo to a fellow member who wanted to try and repair it, and we had the following convo.
