Hello all
I’m trying to resurrect an MSI gt70 laptop (motherboard MS-17621) with a corrupted bios and so I’m using a black ch341a mini programmer with a SOP-8 clip to do this.
The problem is that i can read the chip but cannot write to it. I’ve tried with many software, different versions and 2 OS (win 7 64bit -> AsProgrammer v1.4.1, ch341a programmer v1.18 v.1.30 v.1.xx, fedora -> included flashrom) but the result remains the same with all, i can successfully read my BIOS chip and save my corrupted BIOS to a file but when i’m trying to erase or write the chip it fails without errors ! I mean the process of writing or erasing start without problem but takes a very long time (~1 hour) to complete and when it ends nothing has changed, my corrupted BIOS is still on the chip 
The backup of the corrupted BIOS is always the same with every software and my chip is always well detected.
The chip is a SOP-8 cFeon Q64-104HIP detected as an EON EN25Q64 by every software. The voltage range of this chip is 2.7-3.6 volts and i’ve seen the black ch341a programmer operates under 5V and a fix exists to make it operate under 3.3V. Could the problem come from there ? Or is there any write protection in this chip ??
Thanks in advance for your help and sorry for my bad english.
Best regards.
Hi friend,
i don’t think problem can be the programmer, may be the Climp …
i to check the climp, the cable and rest, get an Eeprom chip which i use to test the working level tools, and make the tests.
If i can read and write and erase it, by the Climp , then the issue is on Motherboard (may be the long cable to climp)
if i got an issue , then i get an soic8 adapter and eliminate the climp , if all is ok then problem is the Climp 
You are talking about a Eeprom chip supported cFeon or EON is the same …
I cannot suggest others , my be any expert …
Regards