Troubleshooting: Have i borked my cpu/mobo

[pacee21]

Hi All,
Hope you can assist. I have a Ryzen 3600 on an MSI X470 Gaming Pro Max. I updated the my bios just now to version 7B79vM9, Release Date, 2021-03-08

Description
- Updated AMD AGESA ComboAm4v2PI 1.2.0.0
- Optimized and support AMD Ryzen 5000 series processors.
- Optimized Resizable BAR (Re-Size BAR) function with NVidia Graphics cards.
- Improved AM4 processor compatibility

Never had an issue prior when updating bios but after the flash went through it now does not show a signal on screen or any peripherals and on the mobo itself there is a constant LED on next on the diagnostics led area next to CPU

I've tried resetting CMOS to no avail. and I believe the mobo itself doesn't have the capability to flash without getting into the BIOS.

Am I SOL and i need to get a 5000 series CPU so that the mobo recognises it or a new mobo that has the compatibility still intact for a Ryzen 3000 series CPU?

Has anyone known this to occur with builds where updating bios to latest revision can lose compatibility with older CPUs? I'm pretty sure i saw a Bitwit video where this happened but for the life of me i cant find it again or find anyone else who has had a similar problem online.

So throwing it out there. Have I:
Cocked a bios update that ruined my mobo
Bios update went fine but lost compatibility.
All of the above
None of the Above

Please help!

 

[mickyflinn]

You wont loose 3000 series compatabilty updating the bios certain very older cpu's may loose support.

Which led does it relate to , have you checked the manual ?

 

[pacee21]

LED light definitely is the one with CPU on it

https://ibb.co/7gQWVn0

Hopefully you guys can see that

 

[humbug]

As above, these older 400 series boards might not have a BIOS chip large enough to support Zen 3 and Zen 2 so when you update the BIOS to Zen 3 Zen 2 (your Ryzen 3600) no longer works.

Let me do some Googling, see what i can find.

 

[pacee21]

Thanks for the assist. Micky's response is the one that worried me but yours seems to align with what i kinda remember happening on BitWits video but it would be a real relief if ican get someone to corroborate

 

[mickyflinn]

LED light definitely is the one with CPU on it

https://ibb.co/7gQWVn0

Hopefully you guys can see that

I would be tempted to try clearing the cmos again using the jbat jumper pin on the motherboard , remove the cmos batteryas well and disconnect all power cables.

Leave for at least 10 mins before setting everything back and try to boot with one stick of ram.

 

[pacee21]

I've cleared CMOS with the quick clear button. power cycles same issue. Removed battery for a few mins while power disconnected. Power cycle, same issue.

The only thing I didn't try is jbat jumper (?) as I'm not exactly sure what that is.

 

[humbug]

AMD did say updating 400 boards to Zen 3 you might lose Zen 2 support.

Once you drop the Ryzen 5000 in to it it should come back to life, But MSI really should have a big red warring on their BIOS page about this, i just looked, there is nothing.

 

[pacee21]

Off to buy a 5600x i go...

And didn't realise AMD had made that statement. For the life of me I cant seen to find any other people in this situation, Which I would expect to be fairly common?

 

[mickyflinn]

As above, these older 400 series boards might not have a BIOS chip large enough to support Zen 3 and Zen 2 so when you update the BIOS to Zen 3 Zen 2 (your Ryzen 3600) no longer works.

Let me do some Googling, see what i can find.

Updating the bios looses supoort for Zen+ as far as im aware.

 

[humbug]

Off to buy a 5600x i go...

Oh, i was assuming you were preparing the board for a Ryzen 5000 and just got a little too eager and did it before the new CPU arrived.

If you don't want a new CPU don't buy it yet, check that your board has a BIOS flashback or not, if it does you might be able to flash the old BIOS back on it with a USB Flash Drive.

Updating the bios looses supoort for Zen+ as far as im aware.

If so he may have borked it then, in which case its worth trying the BIOS flashback.

 

[Quartz]

I thought it was support for Ryzen 1xxx and 2xxx CPUs that was typically lost, not support for 3xxx CPUs. Anyway, before you buy a 5600 try letting it cycle for a few minutes. I've seen videos showing that it can take several boot cycles to start up.

 

[pacee21]

No I checked on my mobo it needs to get into the bios to use the flash utility. You can't flash externally. I could on my on my old board. I thought all MSI boards had that function but looks like i was wrong.

 

[mickyflinn]

No I checked on my mobo it needs to get into the bios to use the flash utility. You can't flash externally. That was the case on my old board. I thought all MSI boards had that function but looks like i was wrong.

You should try what i suggested about clearing the cmos again.

 

[humbug]

No I checked on my mobo it needs to get into the bios to use the flash utility. You can't flash externally. I could on my on my old board. I thought all MSI boards had that function but looks like i was wrong.

Aww crap, ok, unplug the PSU, take the battery out and leave it for 20 minutes.

 

[pacee21]

will try a few more CMOS./battery clears and cycles tonight. Thanks for the help but its looking increasingly likely to be a new cpu. One way to force an upgrade i suppose

 

[humbug]

You have to be sure there is no power to the board, that's why i say unplug the PSU, also give the capacitors enough time to drain, 20 minutes at least

 

[pacee21]

Ahh ok, will unplug PSU connectors as well I didn't think of that. Thanks!

 

[humbug]

Ahh ok, will unplug PSU connectors as well I didn't think of that. Thanks!

Just the PSU from the wall plug cable will do, tho it wont hurt to check all the cables are properly seated, i guess

 

[mickyflinn]

will try a few more CMOS./battery clears and cycles tonight. Thanks for the help but its looking increasingly likely to be a new cpu. One way to force an upgrade i suppose

You need to use ths jbat jumper on the motherboard check the user manual or google it.

Keep us informed.

Good luck .