Question How to fix my bricked PC ?

[Omega0412]

I’m getting pretty desperate with my new pc. Basically I decided to fully upgrade my pc and it’s just been a nightmare. I had it functional so I know all the components are functional but I had to change it from csm to uefi mode and now it’s completely bricked. No post and the VGA light is now on despite absolutely nothing changing there. I have reseated every component 2,4 and even 4 times. I have reset the CMOS. I’ve tried absolutely everything I can think of and now I’m here.

Specs
Mobo. Gigabyte B650 Gaming X AX
GPU: MSI RTX 4070
PSU: Corsair RX750X
Ram: Corsair vengeance DDR5 32gm (2x16gb)

 

[Ralston18]

Question regarding " but I had to change it from csm to uefi mode"

What was the reason?

What did you do?

And you cannot get into BIOS at all via some key press - correct?

 

[Aziren2001]

I would say some simple Troubleshooting-

Reseat the ram (Try with just 8gb for example too)

VGA light can sometimes indicate a Video card problem

Reseat the Graphics card- if the CPU has onboard graphics try without the GPU?

 

[Omega0412]

Question regarding " but I had to change it from csm to uefi mode"

What was the reason?

What did you do?

And you cannot get into BIOS at all via some key press - correct?

CSM is only compatible with upto 2tb hard drives. Mine is 6tb it was causing games to crash constantly…unless the internet misled me on that. And also yes I cannot access bios at all

 

[Omega0412]

I would say some simple Troubleshooting-

Reseat the ram (Try with just 8gb for example too)

VGA light can sometimes indicate a Video card problem

Reseat the Graphics card- if the CPU has onboard graphics try without the GPU?

I have reseated the gpu and also tried another slot and a seperate gpu I know to work. None of these things helped

 

[Misgar]

Remove all the RAM and any hard disks or SSDs. Power on the PC. Leave it for several minutes to see if anything appears on the monitor. It may take a while. The BIOS will object to the lack of RAM and bootable storage, but it might restore functionality. Repeat if necessary with your other GPU.

The main use for CSM is to boot up old operating systems that don't support UEFI, e.g. Windows XP, or to boot up 32-bit operating systems such as older versions of Windows 10, if your UEFI only works with a 64-bit OS.

CSM (Compatibilty Support Module) is often used with MBR (Master Boot Record) which only supports partitions up to 2.2TB. You can use MBR with UEFI on larger drives if you don't mind wasting space over the 2.2Tb limit. Most people use GPT instead of MBR on drives larger than 2TB.

What was the reason for having CSM enabled on your computer? I doubt it was for XP on a machine with DDR5 and no chipset support for this legacy OS. Were you running a 32-bit OS?

I switch between CSM and UEFI on older machines to boot into XP or Windows 10 as required. The machines don't stop working just because I change the BIOS settings, so I'm at a loss to explain why your system failed.

 

[Ralston18]

@Omega0412

How did you reset CMOS?

Did you follow the procedures for clearing CMOS provided by the Motherboard's User Guide/Manual?

 

[Omega0412]

Remove all the RAM and any hard disks or SSDs. Power on the PC. Leave it for several minutes to see if anything appears on the monitor. It may take a while. The BIOS will object to the lack of RAM and bootable storage, but it might restore functionality. Repeat if necessary with your other GPU.

The main use for CSM is to boot up old operating systems that don't support UEFI, e.g. Windows XP, or to boot up 32-bit operating systems such as older versions of Windows 10, if your UEFI only works with a 64-bit OS.

CSM (Compatibilty Support Module) is often used with MBR (Master Boot Record) which only supports partitions up to 2.2TB. You can use MBR with UEFI on larger drives if you don't mind wasting space over the 2.2Tb limit. Most people use GPT instead of MBR on drives larger than 2TB.

What was the reason for having CSM enabled on your computer? I doubt it was for XP on a machine with DDR5 and no chipset support for this legacy OS. Were you running a 32-bit OS?

I switch between CSM and UEFI on older machines to boot into XP or Windows 10 as required. The machines don't stop working just because I change the BIOS settings, so I'm at a loss to explain why your system failed.

The reason my system was in CSM mode was because for whatever reason it wouldn’t work at all in Uefi. Makes 0 sense since all new hardware and windows 11 but for whatever reason I’m cam it actually works