BRICKED P375SM VBIOS UEFI PROBLEM

Sup guys, here is my story

Looking for a vbios for my crossfire 8970m with unlocked voltage to up my GPU clocks (they are working with +-32ºC iddle and +-70ºC load), then i tried bauto's rom.

After flashing the secondary card and boot the notebook worked fine, after i flashed de primary GPU and booted the notebook stoppped working.

Doesn't boot anymore has only the black screen and the fans working nothing more. I even configured in bios to when it boots makes the blip sound but not even de blip is heapenning, i´m using prema biosmod for the P375SM and after looking around the problen is the uefi enabled in bios locks the notebook, as prema stated for this to work with modified vbioses i need to disable uefi, but i cannot boot my notebook, is there a way to enter in bios or some recovery mode than flash it to make it work? I have my original Vbios if there's anyway to fix it can someone tell me??? Or am i f****? I'm almost crying here!!

 

Isn't default non-UEFI? So reset to default would do that ... it'll have an image and pass POST, though you won't be able to boot Windows, of course ('no boot device found').

If default is UEFI then it's still possible to change the setting, only you'll need to navigate blind. So F2, arrow-right, arrow-right .... enter, F10 etc ... Can't help you, don't have a P375SM, but anyone with the Prema bios for that model can simple pen down the sequence of keys needed to disable UEFI.

 

Thanks for the kind answer man the biggest problem is to find someone with the same hardware and custom bios (i´m using prema) and pass me the steps to make it work...

 

Reset bios to defaults yet? Remove button cell + battery + DC adapter, hold power button for 30 seconds. Might set it to non-UEFI, if that's Prema's default ... Remember that whenever you get it to boot non-UEFI you'll still either need to re-install Windows or find some way to change its boot sector. The reverse is possible, at least.

Do think that option's preferable, but could also autoflash the vbios to the original/backup. Of course; different flasher (ATIFlash) and command switches, but the principle's the same.

 

Thanks agan man, yeah i did all of those options, reset bios, another flash software but none of those worked for me.... still looking for it. If nothing works i think i'll have buy another gpu here in Brazil most notebooks are simple very few people use gaming notebooks (too expensive)...

 

Sup guys just a bump here.

As i am now the notebook isn't working i'm trying to blind flash the cards but nothing is working.

The problem is when notebook start i start pressing f7 a lot after some time i press down arrow tried pressing it in different ammounts and even just pressed enter, if i´m thinking correctly the system shows in the first option the avaliable hardrives and in the end the "enter setup" option.

So when i try to enter in the usb driveto flash i don't see any response from the usb drivebecause when is reading it blinks (tested this funcion in another notebook).

After sometime because of the thermalfailover the computer shutdown, then i change the card to the primary slot and nothing heapens.


I read talking with Khenglish about removing the bios ( HERE) i don't know it this is the best choice. And the card did flash well, when i flashed this is what heapened:

1 - Flash secondary card and boot
2 - Ater boot check if vbios changed - it did
3 - Test a game to see if crossfire is working - it worked
4 - Flash primary card and boot
5 - Computer stops working

In all of these steps i didn't remove the cards or swap them, just changed the vbios with atiflash and DOS disk (the same i am using right now)


So i don't think that doing the solder trick will fix the bios because is very different that what i have and i dont think the bios is corrupt.


Anyone has any ideas in what more can i do to fix this, i'm desperate talked to a re-seller here in Brazil and the cost for a new card is $1000,00 for the same 8970m

 

No, not corrupt, but still need stock vbios or somehow set bios to legacy boot. Easiest by far is to ask someone to pen down the exact key sequence to disable UEFI in the P375SM Owner's Lounge. Bound to be several users with Prema bios.

 

Guys just an update to finish it.

I bought the CH341A V1.2, the adapter and some Pm25lv101 bios.

Than i just flashed using this software and solder them back in the GPU.


Tested it and now everything is working fine.

 

Glad it's all working for you Always just flash the primary card for testing, leave the secondary as the backup.

 

You're fortunate it wasn't nVidia. System won't POST with a broken nVidia vbios but as Meaker said... Always flash one first so you can swap them if the flash fails.

 

For sure...

But my system did not post the notebook was "bricked", i had to solder out the bios from the gpu than flashed it with the programmer then put back in the gpu then it worked!!

 

Yeah either brand wont post with vbios being corrupted as the machine has no idea how to initialise the hardware.