[SOLVED] MSI B450 Motherboard is showing VGA debug LED, but GPU is working fine

[viecky]

Hello Folks,

This is my PC Specifications:
Mobo: MSI B450 Tomahawk (MS-7C02)
CPU: AMD Ryzen 5 2600x (6 Cores) with WraithSpire Cooler
GPU: AMD Sapphire RX 6650XT - 8GB
RAM: Corsair Vengeance DDR4-3200 2x8GB
PSU: Cooler Master MWE 750 Gold V2
OS: Windows 11 (with latest updates)

Now the problem is 2 weeks ago when I started my PC after turning it off it didnt start. So I started investigation and found that Mobo is showing red VGA debug light.
After trying for a bit I applied for GPU RMA and today I got the replacement and I installed it. But still its not giving display and mobo is showing same vga light.

Things which I tried:

1. Reset/Clear CMOS battery
2. Tried different GPU
3. Reseated CPU
4. Reseated RAM
5. Removed SSD, HDD and M.2

One thing I noticed this time is that the Flashback feature is not working. Last time I remember I tried flashing BIOS using USB and Flashback button but this time its not working. Even I used the same USB and formatted with FAT32. Tried with the same BIOS version and latest also but its not working.

Please suggest what could go wrong with my PC, I am suspecting Mobo has gone bad but its reading CPU and RAM I mean if I disconnect one the debug VGAs light up respective LED.

 

[Lutfij]

Tried with the same BIOS version and latest also but its not working.
if you've flashed to 7C02v1J5(Beta version), did you clear the CMOS after verifying your BIOS was flashed successfully?

So I started investigation and found that Mobo is showing red VGA debug light. After trying for a bit I applied for GPU RMA and today I got the replacement and I installed it. But still its not giving display and mobo is showing same vga light.
Your GPU might not be receiving power. You should source(borrow, not buy) a reliably built PSU from a friend or neighbor that has 650W at your entire system's disposal and see if the issue persists.

Drop the GPU into your secondary PCIe x16 slot and see if the issue persists.
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One thing I noticed this time is that the Flashback feature is not working.
This might be a motherboard issue as well. Did you follow steps simialr to this guide;

View: https://www.youtube.com/watch?v=ArPoRPecZ_s

to flash the BIOS?

If you can drop all your innards onto a known working motherboard, that would point the finger at your motherboard, which would be in need of RMA'ing, if you're yet under warranty.

 

[viecky]

@lutfi
Yes I have cleared the CMOS. But the problem is this time BIOS flashback is not working. it shows 2 LED blinks and then just solid red.

I tried second PCIex16 slot, but that didnt work

I have followd all the steps needed for flashing BIOS through flashback. and this video I have watched. Actually i have been using Flashback feature with same USB.

Unfortunately, this this its not working with all the same steps.

 

[viecky]

Update:

So I got my PC checked at local repair shop, and they tested each part.
Conclusion: All parts are fine except Motherboard, but he said that motherboard is fine only we need to flash bios but, he is not able to flash the BIOS using USB. Said he has tried 2-3 USB drives.
Can someone help me on flashing the bios on this motherboard. I have gone thorugh the exact steps for flashing the bios using flashback feature.

 

[viecky]

I figured it out that mobo is bricked somehow and needs to be replaced, anyway its out of warranty and served me well over 6 years.
Will get a new one now.
Thanks everyone.

 

[faminepulse]

I figured it out that mobo is bricked somehow and needs to be replaced, anyway its out of warranty and served me well over 6 years.
Will get a new one now.
Thanks everyone.

I created an account to say I experienced this exact same issue with my MSI b450 (ms-7c02). CPU is a Ryzen 5 2700x with the same Corsair Vengeance ram as OP. The VGA light came on randomly one morning when I went to fire up the PC. No display. I followed all the same steps as OP with the same results including Flashback not functioning. All this to say, it gave me comfort to know I wasn't the only one despite the unfortunate circumstances.