Asus Prime Z390-A need rom to 25X05CLNIG - winbond chip

Hello guys. First sorry for bad english. So i have this motherboard. I flashed wrong bios with afudos. I bought a CH341A programmer and accidentally flashed the wrong chip “25X05CLNIG- 64KB” chip and not the real bios chip. I thought this is the bios, but not, the bios chip is next to the battery it’s a GIGADEVICE chip (25B127DSIG, 128Mb). I can’t turn on the mobo anymore when i pressing the power button nothing happened. No fan spinning, debug leds not working. Nothing. Possible to save the motherboard or i can use only paper weight? If i get the same motherboard and save the rom from this chip and write back to my mobo will it work?

  • Short cmos jumper, take off cmos battery, unshort jumper, power on psu (so mobo receive power)
  • try to flash it with CH341A app v1.18 or 1.29, use the gigadevice GD25Q128 option and detect (since it’s 128Mbit, then program it and verify make sure everything the same (buffer same),
  • do not unplug soic clip if you use it, short cmos jumper again, unpower psu and press and hold power button for 5 seconds, plug cmos battery, unshort cmos, boot up like normal

Blockquote If i get the same motherboard and save the rom from this chip and write back to my mobo will it work?

I think this is a good way

I tried this, but no difference. Mobo won’t power on. The winbond chip is erased so need rom for it.

Just flash the rom?

Download the mobo bios, extract it using uefitool from.cap, and flash it.

Yes flashed the gigadevice chip with bios. And what the other chip? The programmer shows value are “FF”. nothing on a chip.

Well, that’s expected after trying to flash, most programs erase the chip first, meaning writing FF to it.

Chip is EC SPI Flash.Taking its content from another identical same revision board and flash it back might work.

There are some used boards on ebay, I think it’ll be quite hard or impossible to find the dumped content of this chip somewhere, and I doubt you’ll find people reading it out just to do you a favour- might at least take some time.

Don’t erase an unknown chip without having checked at least if the size fits and without taking at least a valid backup/dump first.

This is was my mistake. I was convinced this is the bios chip.
" Chip is EC SPI Flash.Taking its content from another identical same revision board and flash it back might work. " Wow nice information, thank you.

Guys, i got same motherboard. I saved the rom from the chip and flashed back to my mobo, and it WORKS!!! WoWW. I can’t believe. Works perfectly. Thanks for the help guys. :wink: Have a nice day.

Now… as a good forum user and if you want, since its an unusual dump of the specific chip, the community will appreciate if you can share here for future users with common issue…but rare same situation and congrats on solving the issue, good luck.

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Yes, if somebody gets into a similar situation here is the dump for fix:
Chip places: Here
25X05CLNIG chip dump: Link
Motherboard revision : 1.02

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Thank you, for sharing here with us, all the best.

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