Reply 20 of 35, by AvalonH
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smoke86 wrote on 2022-10-06, 21:42:Update: I managed to do a bodge wire mod as described above, but nothing changed.
I think it may be faulty 83706 controller and further repair attempts won't make any sense.
Can you post a picture of the chip (after you soldered the wire).
I have got two Zappa boards and one of them has the exact same issue, not saving bios settings and time/date. On the working board with power off and cmos battery in, Pin7 - VBAT - measures 3.008V (one lead on pin 7 and one on ground). This is a new battery and taking it out of the board it measures 3.009v, so barely any drop while in the board and powering cmos memory.
On the other board that doesn't store cmos settings, pin7 measures 0.2V.
Searching around the web and Usenet I found other reports of the same problem, all on 430FX Intel Advanced boards (Zappa, Morrison, Endeavor) and all using PC87306.