B550M Pro SE silent boot failure

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   Well, I assumed that an AM4 motherboard would support AM4 CPUs, but apparently not; Ryzen 3,5,7 models below 3000 are not on the QVL and do not boot- I tried two different ones. What I was told is that the BIOS has a list of model numbers and their voltages, and won't start the OS unless it finds a match.

This is not unreasonable (albeit annoying) given how many different Ryzen CPU models exist.

What I do find objectionable is that it simply stops, with nothing on the monitor and without any beep code (there is a code for "CPU failure", but it does not get sounded). I know the speaker is working as it beeps when this rig is powered up with no memory.

I suppose if I had a PCI-E-specific POST card I might get some more information that would lead me to repent my sin of assuming that AM4 mobo supports AM4 CPUs.  But I don't.

And there are of course no LEDs on the motherboard either.

Now (finally) the question: does anybody know (for sure) if any of the 4 LED connectors (ADDR_LEG, RGB_LED) would provide diagnostic information like POST codes, or if these are simply for decorative LEDs ("Brace yourselves. Christmas is coming!")?

Factual answers would of course always be appreciated.

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I,Darwin Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 3 hours 40 minutes ago Location: Ontario, Canada Status: Offline Points: 20	Post Options Post Reply Quote I,Darwin Report Post Thanks(0) Quote Reply Topic: B550M Pro SE silent boot failure Posted: 3 hours 25 minutes ago at 8:18am
	Well, I assumed that an AM4 motherboard would support AM4 CPUs, but apparently not; Ryzen 3,5,7 models below 3000 are not on the QVL and do not boot- I tried two different ones. What I was told is that the BIOS has a list of model numbers and their voltages, and won't start the OS unless it finds a match. This is not unreasonable (albeit annoying) given how many different Ryzen CPU models exist. What I do find objectionable is that it simply stops, with nothing on the monitor and without any beep code (there is a code for "CPU failure", but it does not get sounded). I know the speaker is working as it beeps when this rig is powered up with no memory. I suppose if I had a PCI-E-specific POST card I might get some more information that would lead me to repent my sin of assuming that AM4 mobo supports AM4 CPUs. But I don't. And there are of course no LEDs on the motherboard either. Now (finally) the question: does anybody know (for sure) if any of the 4 LED connectors (ADDR_LEG, RGB_LED) would provide diagnostic information like POST codes, or if these are simply for decorative LEDs ("Brace yourselves. Christmas is coming!")? Factual answers would of course always be appreciated.
	You've seen one computer, you've seen them all.