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View Full Version : G750jh Bricked Bios after update [solved]



Mitko
12-27-2014, 08:08 PM
Hi! I need help with my Asus g750jh. I bricked BIOS after update. Can anyone send me dump of BIOS asus g750jh? thanks!

hmscott
12-27-2014, 08:13 PM
Hi! I need help with my Asus g750. I bricked BIOS after update. Can anyone send me dump of BIOS asus g750? thanks!

Mitko, if you bricked your G750JH during a BIOS update you need to send in your laptop to get the BIOS chip replaced - or the whole motherboard needs replacing on those models with a soldered on BIOS chip.

Asus will RMA it, but you need to file a request here:

https://vip.asus.com <== create a login, register your laptop, file a Technical Inquiry with clear description of problem and request repair RMA.

You can't fix it with a dump of BIOS from another G750JH.

Given your description, perhaps there is something else wrong, and it isn't booting, but can you get into the BIOS?

What are the symptoms when you power on the laptop?

From power off, press the power button to turn it on, then start tapping the F2 key - not Fn+F2, just F2, and see if that gets you into the BIOS.

Please let me know if that works.

Mitko
12-27-2014, 08:15 PM
laptop is not POST-ing, F2 key is not working, the display stays black.

Mitko
12-27-2014, 08:16 PM
I tried to remove the Battery and the power cable, removed the small 3.3V battery inside, pressed the power button for 2 minute, nothing. The BIOS settings won't reset

hmscott
12-27-2014, 08:19 PM
laptop is not POST-ing, F2 key is not working, the display stays black.

Mitko, there used to be a sticky posting in the G75 forum that gave the startup sequence to flash from a USB thumb drive, when you can't get into the existing BIOS. I don't see it there now. It's called an emergency flash.

I think you put the BIOS file, unzipped from the zip file, on to an empty flash drive, and power up holding CTRL+HOME with the USB flash drive plugged in.

I would use a flash drive with an activity light so you can see if the laptop is reading the flash drive.

I would hope Asus names it correctly in the zipfile...but you might try a couple of names. Look at the accompanying text file if any with the proper flash file name, and rename it to that, and look in the description in the download area. You can try all the naming variations.

You could ask Asus if they can send you the directions, then post it here, whether it works for you or not... :)

Mitko
12-27-2014, 08:33 PM
I've tried various reboot combinations with bios file one flash drive (ctrl, ctrl+hold, fn+esc,m,f,b ...etc) it is not work.
When i used a combination CTRL+HOME it's seemed begins to read information from a flash but then everything stops and nothing happened.

hmscott
12-27-2014, 08:36 PM
I've tried various reboot combinations with bios file one flash drive (ctrl, ctrl+hold, fn+esc,m,f,b ...etc) it is not work.
When i used a combination CTRL+HOME it's seemed begins to read information from a flash but then everything stops and nothing happened.

Mitko, ok so CTRL+HOME is the key combo, but now we need to get the file name correct.

Do you have a G750JH or G750JHA, there are 2 different BIOS branches, and you need the right one.

Here is the G750JH support download area:
http://support.asus.com/download.aspx?SLanguage=en&p=3&m=G750JH&hashedid=hadqiWUmqVj4iNX5

For the G750JH it is BIOS 206, for the G750JHA it is the BIOS 204:

44683

Which one have you tried? And, what name did you give the file?

The file names I get when unzipping the 2 BIOS's are:

G750JHA-AS.204
G750JHAS.206

If I load then in Windows in Winflash I see the file named the model name, G750JHA and G750JH

My G750JHA sees I already have this BIOS loaded and complains.
44684

My G750JHA sees this is a BIOS for another model, and complains.
44685

Try putting 1 at a time on the flash drive, name G750JHA-AS.204 as G750JHA.bin and then G750JHAS.206 as G750JH.bin

Make sure to use only 1 file at a time to make sure the laptop doesn't read one it doesn't like first, and stops.

See which one the laptop likes :)

Mitko
12-27-2014, 08:42 PM
i'v tried AMIBOOT.BIN AMIBOOT.ROM G750JHAS.206 G750JHAS.ROM G750JHAS.BIN G750JH.ROM,BIN,206... nothing :( do you know another combinations?

hmscott
12-27-2014, 08:50 PM
i'v tried AMIBOOT.BIN AMIBOOT.ROM G750JHAS.206 G750JHAS.ROM G750JHAS.BIN G750JH.ROM,BIN,206... nothing :( do you know another combinations?

Mitko, refresh the page ALT-R in your browser, I have updated the post, here are the names I suggest:

Try putting 1 at a time on the flash drive, name G750JHA-AS.204 as G750JHA.bin and then G750JHAS.206 as G750JH.bin

Make sure to use only 1 file at a time to make sure the laptop doesn't read one it doesn't like first, and stops.

hmscott
12-27-2014, 08:59 PM
Mitko, finally found the thread I was recalling, here is the link to the procedure and the steps listed here too:

G750JZ - Boot Failure (this points to the steps used to fix a G750JH-DB71)
http://rog.asus.com/forum/showthread.php?47017-G750JZ-Boot-Failure&p=405011&viewfull=1#post405011

"What I did to solve the problem:
- Format a flash drive (I used a 4 GB) to FAT
- Place the latest appropriate BIOS from Asus's support site onto the flash drive (Make sure to differentiate between G750JH and G750JHA). In my case, I needed the G750JHA bios.
- Rename the file appropriately (e.g. G750JH.bin, G750JHA.bin)
- Place the flash drive into the defunct computer
- Hold down CTRL+HOME, and then press the power button while continuing to hold down the keys
- Follow the on-screen instructions
- Reboot, and wait ~20 seconds, and it works"

Maybe you need to do the "Hold down CTRL+HOME, and then press the power button while continuing to hold down the keys" step precisely to get it to work.

Mitko
12-27-2014, 09:16 PM
Thancks for this , i ll try it

hmscott
12-27-2014, 09:36 PM
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#post119624

"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
02-18-2016, 04:16 PM
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
09-19-2016, 05:25 PM
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. :D

brolsergii
07-18-2017, 10:47 AM
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
03-31-2018, 09:45 AM
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
08-12-2018, 08:49 AM
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
01-02-2019, 08:51 PM
Hi ! Anybody have a full flash bin for rog G550jk bios 8mb ? I have a bricked MB.