Yeah should be no problem as the corrosion looks localized. Just clean up the battery juice and corrosion with vinegar and fix up any broken traces. There is a portion beneath the ISA slot and RAM slots that looks affected though, so it is good if you could desolder some of them and clean below.

kalohimal wrote on 2020-07-23, 13:33:

Yeah should be no problem as the corrosion looks localized. Just clean up the battery juice and corrosion with vinegar and fix up any broken traces. There is a portion beneath the ISA slot and RAM slots that looks affected though, so it is good if you could desolder some of them and clean below.

Thanks for the reply, I'll do a cleanup and see where we are!

Check continuity between the keyboard connector pins and the keyboard controller pins (not in order):

1. - NC
2. - pin 5
3. - pin 39
4. - pin 20
5. - pin 1

Beware that there are different types of configurations but most 386 boards I've checked used this scheme. Check the remaining trace paths too before soldering anything.

I soaked an entire motherboard for 2 days in vinegar and it worked. It cleaned up all the corrosion but also destroyed allot of other capacitors. I don’t know if these capacitors were bad anyways but it cleaned up all the corrosion very good.
So I dont recommend you soak the motherboard for more than a few hours. Also scrub with a small brush like a tooth brush.