G750jh Bricked Bios after update [solved]

[Mitko]

Hi! I need help with my Asus g750jh. I bricked BIOS after update. Can anyone send me dump of BIOS asus g750jh? thanks!

[Mitko]

Thancks for this , i ll try it

[hmscott]

Mitko wrote:
Thancks for this , i ll try it

Here is the original Post from Asus

Had a bad BIOS flash? Read this!
http://rog.asus.com/forum/showthread.php?17622-Had-a-bad-BIOS-flash-Read-this!&p=119624&viewfull=1#p...

"Had a bad BIOS flash? Read this!

After a meeting with the engineers I've been told there's a failsafe built into G75/G55s:

Power on and hold down ”ctrl+home” immediately. The system will attempt to call back the original BIOS. If the BIOS flash has gone very badly and this does not work however, it will require a call to our customer service department.

Please try to update using EZFlash within the BIOS when the power is plugged in (not on battery) using a reliable (not cheap/free) FAT32 USB stick.

Thank you all. "

[Mitko]

SOLVED!!!
So here are the basic steps:

1. Gain access to the SPI ROM
2. Using a SPI ISP programming adapter, or device programmer, read and store
the bricked BIOS image (8MB, Winbond W25Q64)
3. Download, from Asus, the BIOS update file, for the version that you were
originally running, before the failed update attempt.
4. Using a hex editor, merge the two images as follows:

Reconstructed_Image 0x0 - 0x1FFFFF = Bricked_Image 0x0 - 0x1FFFFF ( 2 Mb).
Reconstructed_Image 0x200000 - 0x7FFFFF = Update image 0x800 - 0x6007FF ( 6 Mb)

Reconstructed_Image (8Mb) = Bricked_Image (2Mb) + Update image (6Mb)

5. Program the Reconstructed_Image into your SPI Flash
6. Power-up or power cycle the laptop (your G750 should be alive again)
7. Enter BIOS setup, by pressing F2
8. Select "Restore Defaults"
9. Save and exit

Here is my Reconstructed Image:
https://www.dropbox.com/s/cxdiyzkxh0f5p9l/Reconstructed_Image_206_asus_G750JH.bin?dl=0

Good luck!!!

[FlashGordon]

Thanks for this thread! It was instrumental to my recovery process. After much ado with my raspberry pi, and flashrom, I got the bios chip talking with a SOIC ISP clip.

My resulting bios image is different from what Mitko posted. I would try to avoid using someone else's BIOS as it likely has system specific information on it (MAC and such).

After I got the ROM ripped, I used "dd" in linux to carve out the file parts that were needed.

Something like:
dd if=brickedbios of=bricked2M count=4096
dd if=206bios of=206bios6M skip=4
cat bricked2M 206bios6M > recovered_image

*** NOTE: dd uses a default 512 block size, so count and skip are multiplied by 512 to get the right distance in the files. ***

I did an md5sum on all the images (my new bios, mikto's, and the bricked bios), they all came back with different hashes. (No surprise there.)

They did all have the correct 8M size when I was finished.

I can add more info about using the Pi with a clip as a programmer if anyone is interested. I did have to use the laptop's PSU in order to power the chip, because the Pi 3.3V can only supply 50mA. That was not enough to power the chip while it was in system. So I disconnected the 3.3V connection on pin 8 for my clip, and drove it with the PSU instead. If you do this DO NOT TURN ON THE LAPTOP. Simply pluggin in the AC power adapter is enough to power the chip.

The only other hiccup was to make sure that my Pi was on before clipping into the laptop and pluggin it in. After that, it all worked like a charm. 😄

[brolsergii]

Hi everyone,

I have exactly the same problem with my G550JK and I'm still trying to find a way to recover from a failed BIOS update (which was launched by Win10 update without me knowing).

So I've registered my laptop at http://vip.asus.com and I've downloaded the latest version on the bios that is N550JKAS.208 (before I've registered the laptop I've been trying with G550JKAS205 and G550JKAS204) and I'm launching my laptop with Ctrl + Home + Power. I can see that the USB drive is read by the system but still I have no progress (the only thing with is running good is the fan of the cpu)

I've managed to get the bios chip name : winbond 25q64fvsig 1423 but it is soldered and I have no option to unsolder it for the moment.

So I'm wondering what should the name on the file be in order to recover the bios. Up to now I've tried : G550JKAS.205, G550JKAS.bin, G550JK.bin, G550JK-AS.bin, G550J.bin, G55JK.bin, bios.bin, N550JKAS.208, N550JKAS.bin, N550JK.bin, N550J.bin, N55JK.bin. So am I missing something?

[brolsergii]

brolsergii wrote:
Hi everyone,

I have exactly the same problem with my G550JK and I'm still trying to find a way to recover from a failed BIOS update (which was launched by Win10 update without me knowing).

So I've registered my laptop at http://vip.asus.com and I've downloaded the latest version on the bios that is N550JKAS.208 (before I've registered the laptop I've been trying with G550JKAS205 and G550JKAS204) and I'm launching my laptop with Ctrl + Home + Power. I can see that the USB drive is read by the system but still I have no progress (the only thing with is running good is the fan of the cpu)

I've managed to get the bios chip name : winbond 25q64fvsig 1423 but it is soldered and I have no option to unsolder it for the moment.

So I'm wondering what should the name on the file be in order to recover the bios. Up to now I've tried : G550JKAS.205, G550JKAS.bin, G550JK.bin, G550JK-AS.bin, G550J.bin, G55JK.bin, bios.bin, N550JKAS.208, N550JKAS.bin, N550JK.bin, N550J.bin, N55JK.bin. So am I missing something?

Last time I asked a guy with the programmer to help me out. But recently Windows 10 creators upgrade has ones again bricked my laptop by trying to update my bios.
So I've ended up buying a CH341A USB EEPROM programmer and a SOIC8/SOP8 pin so I won't need to unsolder my chip. It has cost me 22€ and eventually I had an access to my bios chip memory. Thanks to Mitko's post here I could reconstruct the bios ROM using Frhed as a hex editor for windows and I used the same rule:
Reconstructed_Image 0x0 - 0x1FFFFF = Bricked_Image 0x0 - 0x1FFFFF ( 2 Mb).
Reconstructed_Image 0x200000 - 0x7FFFFF = Update image 0x800 - 0x6007FF ( 6 Mb)
Plus ignoring the overhead while writing the Rom.

However I've got an issue with my keyboard highlighting since the last windows 10 upgrade and ATK Package reinstall won't help. If you have and suggestions, any help would be appreciated.

[Areosjc]

brolsergii wrote:
Last time I asked a guy with the programmer to help me out. But recently Windows 10 creators upgrade has ones again bricked my laptop by trying to update my bios.
So I've ended up buying a CH341A USB EEPROM programmer and a SOIC8/SOP8 pin so I won't need to unsolder my chip. It has cost me 22€ and eventually I had an access to my bios chip memory. Thanks to Mitko's post here I could reconstruct the bios ROM using Frhed as a hex editor for windows and I used the same rule:
Reconstructed_Image 0x0 - 0x1FFFFF = Bricked_Image 0x0 - 0x1FFFFF ( 2 Mb).
Reconstructed_Image 0x200000 - 0x7FFFFF = Update image 0x800 - 0x6007FF ( 6 Mb)
Plus ignoring the overhead while writing the Rom.

However I've got an issue with my keyboard highlighting since the last windows 10 upgrade and ATK Package reinstall won't help. If you have and suggestions, any help would be appreciated.

I got the same issue, after flashed reconstructed image i lost the keyboard backlight, do you managed to fix it? If so, how do you done?
I also lost the serial number inside bios. What are those offsets we leave out of equation?*

Thank you!!!*

[pin777]

Hi ! Anybody have a full flash bin for rog G550jk bios 8mb ? I have a bricked MB.

[404_not_found]

Is the thread still alive ?

Bricked my g750jm.

Flashed g750jw bios on it by programming machine.

Just the power lid nothing else.

Again flashed the previous file dumped from programming machine before replacing bios image.

Now the laptop is completely silent no power lid no spinning fan nothing.

Please help.Â*

[Blake1]

404_not_found wrote:
Is the thread still alive ?

Bricked my g750jm.

Flashed g750jw bios on it by programming machine.

Just the power lid nothing else.

Again flashed the previous file dumped from programming machine before replacing bios image.

Now the laptop is completely silent no power lid no spinning fan nothing.

Please help.Â*

Hello 404_Not_Found,
Please kindly send your device to service center.
Thank you.