Dead 8600M GT Afer flashing bad bios

Hi,

Apparently i was trying to fix my GPU card because it was presenting garbled characters all over in msdos and stripped colors in windows, but i did a flash using nvflash and now the LCD on POST seems to be struggling buit doesnt turn on, thus nothing shows..this happens indefinitely ( i waited at least 5 minutes )

Do i have a dead card?
I understand that if i were in a desktop pc i could plugin an adicional display but this is a notebook....

How can i blind flash my 8600M GT ?

I have tried a bootable USB with nvflash loaded trough autoexec.bat but the problems seems to be that now the CPU wont even get past the POST because of the graphics card...

Any brilliant idea or suggestion? Thanks in advance

 

Take out the battery and the cmos battery the little silver round one for like 5 minutes also hold down the power button too and see if that helps.

 

Hi thank you for your suggestion, but the problem is a bit more serious than that, i meant i flashed my VBIOS ( GPU FIRMWARE ) not the motherboard BIOS. So removing the CMOS battery had no effect, i needed a way to bypass the GPU during POST so that i can boot from USB pen and reflash the GPU

 

You are right, C90S's video card is MXM and it has it's own VBIOS, therefore, removing CMOS battery has no effect at all.

It probably wont' bypass GPU during post because it's just like desktop it reads VBIOS first and then the MB BIOS.

 

gf 8600m is awful . I suggest your should upgrade your card.

 

Sounds like your card was already defective before the flash.

 

The card suited me fine for a year and a half, and i dont have reasons to upgrade if it could at least work again, I am no gamer, and certainly no overclocker ( altough i overclocked it a year ago just for an evening to test a recent game ) . the only thing i did recently was to have multiple virtual machines running from the C90s and installing the recent NVIDIA official drivers for notebooks. Other than that i did nothing and the corrupted display happened all of a sudden during a checkers game i was playing. I somehow suspect that this was due to bad termal paste appliance, or bad quality termal paste appliance as it was suggested to me on another thread.

My next step is to contact ASUS regarding this issue but if someone as a clue to what is really going on or how to try do fix it with VBIOS blind flashes please add...thanks

 

But werent the 8 Series mobile chips mostly defective anyways? It could have served you with zero issues for 2 years and still be a defective chip.

Im not familiar with all the affected models but as you may know the G1S is plagued by 8400M failures as well as many other laptops. Read a bunch of stuff on how they were all defective just burned up after a year and a half.

 

@ ClutchX2:

Indeed it may be an argument to use with ASUS as its still under warranty..

BTW i saw this http://www.mxm-upgrade.com/7520G.html

and the user says in the end "my thanks go to the great team of MXM upgrade and there great assistance in getting my video card to work again.
I’ve had a serious problem with a bios flash in my card (purily my fault due to a mistake I made while trying to edit the bios) an ended up with a dead one that would give me nothing but a black screen and a useless laptop. Fortunately the wonderful people at MXM Upgrade offered me a very nice deal and did a great job in getting my card back to work"

This resembles my situation, how did they put the card back to work again? with a special platform to flash the VBIOS? Or another trick we dont know?

 

@Jaguar Yes, it is very true, i would never had flash the vbios otherwise

@GenTechPC I wonder if it is possible to bypass the GPU verification?

I have contacted ASUS but still waiting for an answer. In the meanwhile, the new VBIOS i injected i am almost certain that it was from a 8600M GT 256 DDR3, thus i dont have enough power to feed the card now as i have a 90W PSU, and it seems as if the card struggles to show something on the LCD and communicate a valid POST, but its not getting enough power?!

Interestingly enough, i removed the graphics card and booted the c90s without it and it POSTS correctly and boots from CD and/or pendrive, i just cant see anything as i dont have the graphics card ( duh )

.Could trying a 120W PSU provide with a valid POST with the graphics card in?
I dont have one to try out

.There is a combination of keys Alt+F2 at the beginning of the POST process we can press to do BIOS blind flashes, i wonder if there is any combination for VBIOS blind flashes? Or combination of keys to skip the graphics card POST process?

Hard questions i know...

The other thing im not sure if it would be possible was to introduce the card with the notebook turned ON after the POST has passed and try reflashing this way.....Your toughts?

Thanks again