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

lordviecky
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Go to solution Solved by OddOod,
On 12/8/2024 at 6:55 AM, lordviecky said:

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.

Sounds like the mobo is bricked. It *might* be possible to use some specialized gear to directly flash the board, but you'd need to do quite a bit of research and already be a pretty solid micro electronics engineer.
Even then, it's probably not just a bad BIOS, but actually bad components. If this were a hard to find part or necessary for a high value production line in a factory, yeah, definitely dig into a repair job. But this is an AM4 mobo, just replace it. 
 

Posted

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
  6. Tried GPU in different slot

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.

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1 hour ago, lordviecky said:

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.

Have you tried a GPU in a different PCIe slot? Your current or another

System specs:

 

 

CPU: Ryzen 7 7800X3D [-30 PBO all core]

GPU: Sapphire AMD Radeon RX 7900 XTX NITRO+

Motherboard: MSI MAG B650 TOMAHAWK WIFI

RAM: G.Skill Trident Z5 NEO RGB 32GB 6000MHz CL32 DDR5

Storage: 2TB SN850X, 1TB SN850 w/ heatsink, 500GB P5 Plus (OS Storage)

Case: 5000D AIRFLOW

Cooler: Thermalright Frost Commander 140

PSU: Corsair RM850e

Case Fans: Fractal Prisma (120 x6, 140 x3)

 

PCPartPicker List: https://uk.pcpartpicker.com/list/QYLBh3

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Welcome to the forums!

My guess is that you've got a borked mobo. 
It IS possible you have some weird PSU problem, but given the failed BIOS flashing, that's probably it. 

5950X/4090FE primary rig  |  1920X/1070Ti Unraid for dockers  |  200TB TrueNAS w/ 1:1 backup

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  • Author

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.

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  • Solution
On 12/8/2024 at 6:55 AM, lordviecky said:

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.

Sounds like the mobo is bricked. It *might* be possible to use some specialized gear to directly flash the board, but you'd need to do quite a bit of research and already be a pretty solid micro electronics engineer.
Even then, it's probably not just a bad BIOS, but actually bad components. If this were a hard to find part or necessary for a high value production line in a factory, yeah, definitely dig into a repair job. But this is an AM4 mobo, just replace it. 
 

5950X/4090FE primary rig  |  1920X/1070Ti Unraid for dockers  |  200TB TrueNAS w/ 1:1 backup

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Computer woke up before the monitor did.

 

I don't let it sleep.

AMD R9 5900X | Thermalright Frost Commander 140, NF-A14 3K, T30

Asus CH8 Dark Hero | 32GB G.Skill Trident Z @ 3733 14-14-14-34 1.5v

Zotac 4070 Ti Trinity OC @ 3045/1500 | WD SN850, SN850X, SN770

Vertex GX-1000 | Fractal Torrent Compact, 2x AL-180, TL-B14, TY-143

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yes @OddOod
I figured it out that mobo needs to be replaced and thanks for confirming, anyway its out of warranty and served me well over 6 years.
Will get a new one now.
Thanks everyone.

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