[Guide] Flash BIOS with CH341A programmer

[junjoo]

UNDER CONSTRUCTION

PART 2

INSTALL DRIVER, READ, VERIFY, SAVE BACKUP:

Download here the CH341A tools (Thanks to Lost_N_BIOS)

Unzip the downloaded pack and install the ch341a drivers (run CH341PAR.EXE)

Remove CMOS battery from your motherboard.
Connect the test clip to bios chip.
Connect ch341a programmer to USB.
Run CH341A_c.exe from CH341A programm v1.29 folder.

Go to "Auto" and uncheck "Erase" and "Blank check" options:

Press "Read button" and wait until the process is finished:

Now press "Verify" and wait until the process is finished:

Attention, before continuing with the PART 3, please check the content of the backup file.

You can compare the backup file with the original bios file from manufacturer site, using one hex editor software.

The contents of the files is not the same but it is very similar.

Lost_N_BIOS
Run read, then verify, once it says "Chip/Buffer match" then that is verified, click save and then open that file in hex editor and make sure it’s valid BIOS and not all FF’s.

If it is all FF’s, that’s verified invalid blank and you need to use another software version or CHIP ID and try again until you get verified and valid backup).

Lost_N_BIOS
Then install driver in above package. Then open software of your choosing to try first, I already try newest version first. Hit detect and if it detects your chip by ID OK, then select that one. Sometimes you might need to choose less than full ID, or different than ID too, like BIOS ends in FV sometimes BV works better, but you’ll figure that out later if it comes to that. Once you’ve done that, hit read and when it’s done hit verify. If it verified good, then you hit save BIOS. Verify after reading it should tell you chip and buffer or memory match, then that is possibly a good verified file (not always). Open that file in hex editor and make sure it’s not all FF"s. Then repeat that a time or two and compare those two verified files, if they’re always good files and match then probably OK. Save this BIOS somewhere safe as backup. Make sure it opens properly and looks correct in any BIOS editing tools you are familiar with too, then you’ll know it’s OK.

Backup file examples (OK and wrong):