MSI B650M-Pro Common Problem?

SkidMarkKing · 7 Jul 2026 at 10:42

Hey,

Recently had a problem with the MSI B650-Pro motherboard where the Boot light and VGA light stay on as soon as the power cable is plugged in. The case fans spins but not the CPU fan.

Tried all sorts, one ram stick at a time, reset the CMOS, tried onboard graphics (Ryzen 7 8600G CPU), a different graphics card, wifi card removed, no display and the case fans just spinning.

Swapped the motherboard and the CPU fan spun as normal when powering on using the case button including the happy beep, diagnostic lights gone, all seemed ok.

Now 12 hours later it's gone back to the same. Did notice on this replacement board some of the components on the motherboard appear to be on a slight angle as if there has been a fault when the motherboard has been assembled/built in the factory.

Common issue with these boards?

mickyflinn · 7 Jul 2026 at 12:07

Motherboard bios up to date ?

SkidMarkKing · 7 Jul 2026 at 12:11

mickyflinn said:
Motherboard bios up to date ?

Have done that this morning.

Going to advise a different board instead of replacing like for like.

mickyflinn · 7 Jul 2026 at 22:00

SkidMarkKing said:
Have done that this morning.

Going to advise a different board instead of replacing like for like.

Go b850

Blackjack Davy · 9 Jul 2026 at 04:43

SkidMarkKing said:
Common issue with these boards?

I've had a b650 Tomahawk for the last three years can't say I've had any issues with it

SkidMarkKing · 10 Jul 2026 at 10:36

Absolutely stumped on this one.

Second replacement board I advised the B850. After building that outside of the case with just the PSU, 1 RAM stick at a time and CPU there's no life at all. Not even when using a screwdriver to short the power on pins.

Only way I get any life is by pressing the Q-Flash button which the CPU fan then spins but all power cuts out in 2-3 seconds (The CPU is compatible without bios updates). I've tried a different power supply as well.

If remove the CPU from the B850 board I get the red CPU light (not shown on the 2 B650M Pro boards), just VGA/Boot on those boards were shown.

Waiting on a different CPU to try today.

mickyflinn · Thursday at 21:24

SkidMarkKing said:
Absolutely stumped on this one.

Second replacement board I advised the B850. After building that outside of the case with just the PSU, 1 RAM stick at a time and CPU there's no life at all. Not even when using a screwdriver to short the power on pins.

Only way I get any life is by pressing the Q-Flash button which the CPU fan then spins but all power cuts out in 2-3 seconds (The CPU is compatible without bios updates). I've tried a different power supply as well.

If remove the CPU from the B850 board I get the red CPU light (not shown on the 2 B650M Pro boards), just VGA/Boot on those boards were shown.

Waiting on a different CPU to try today.

Any update ?

SkidMarkKing · Thursday at 21:59

mickyflinn said:
Any update ?

You wouldn't believe it.

Worked fine for 3 hours for me with a new CPU and the B850 board. Customer got it back for the third time, no power at all. Came back to me again still no power, tried PSU etc. Ordered a second B850 board and a new case, I've built it and all working ok. I advised he has his electric socket checked.

Also do away with the 3 in one cube adapter thing. TVs are ok on the same socket but are less prone to damage due to not demanding as much from the socket.

Electrician went out and said the socket was ok but has been replaced just incase. If the board gets fried this time the electrician did say he may need to put the PC on its own circuit which seems a bit far fetched.

Client has also heard about a device you can plug into your phone to test USB devices/ connections?

mickyflinn · Thursday at 22:24

SkidMarkKing said:
You wouldn't believe it.

Worked fine for 3 hours for me with a new CPU and the B850 board. Customer got it back for the third time, no power at all. Came back to me again still no power, tried PSU etc. Ordered a second B850 board and a new case, I've built it and all working ok. I advised he has his electric socket checked.

Also do away with the 3 in one cube adapter thing. TVs are ok on the same socket but are less prone to damage due to not demanding as much from the socket.

Electrician went out and said the socket was ok but has been replaced just incase. If the board gets fried this time the electrician did say he may need to put the PC on its own circuit which seems a bit far fetched.

Client has also heard about a device you can plug into your phone to test USB devices/ connections?

What an absolute pain must have been so frustrating , have you got any hair left as I would have pulled all mine out.

SkidMarkKing · Thursday at 22:29

mickyflinn said:
What an absolute pain must have been so frustrating , have you got any hair left as I would have pulled all mine out.

Starting to pull mine out, lol

Waiting to hear back on how it's going.

The poor guy hasn't seen it working yet, I've sent photos to prove it does actually work for me.

mickyflinn · Thursday at 22:34

SkidMarkKing said:
Starting to pull mine out, lol

Waiting to hear back on how it's going.

The poor guy hasn't seen it working yet, I've sent photos to prove it does actually work for me.

Let us know when you hear