I tried updating the BIOS on my MSI 970A-G46 using the Windows-based flashing utility instead of M-Flash. The computer froze for about ten minutes, so I held the power button to shut it down. Since then it will not POST or boot. I bought a CH341A programmer, modified it for 3.3 V, and tried several BIOS files, including a version 2.8 file, a file I reconstructed from the Windows executable, and version 1.11 from MSI's website. NeoProgrammer reported that each write completed successfully, but the system still does not start. I have also removed the CMOS battery, cleared the jumper, and discharged the board.
The SOIC8 clip is now worn out and no longer makes reliable contact, so I am considering buying a cable for the JSPI1 header. Before spending more money, I want to know whether that would help, whether I may be using the wrong BIOS image, and whether it would be better to replace the motherboard with another 970A-G46.
2 Answers
A successful programming report only means the programmer believes it wrote the data; it does not prove that the image is correct for the board or that every pin made good contact. Confirm the exact board identity first. The 970A-G46 should be marked MS-7693, usually with a version number such as VER 2.0 printed on the PCB. Use a BIOS image specifically intended for that exact revision, and make sure the chip’s capacity and manufacturer match what the programmer detects. A file from a different revision or an improperly extracted executable can write correctly and still leave the board unable to POST.
Before writing anything, the safest procedure is to read the chip several times and compare the dumps byte-for-byte. That confirms the clip is making reliable contact and gives you a backup of the board’s original contents. Even if the BIOS seems corrupted, the dump may contain board-specific data or regions that a downloaded image does not include. Since the clip is worn, replace it or use a properly wired header connection, then verify the read repeatedly before flashing. Also compare the intended image against the chip size and the exact MS-7693 board revision. I would not buy another motherboard until those checks are done.
I did not save an original dump because I assumed the damaged BIOS would be useless. I only have the downloaded and reconstructed images now.
I did the 3.3 V modification before using the CH341A. I have not found another BIOS image that clearly matches the board, though.