First post, by Deksor
Hi there ! I just bought a lot of junk motherboards, and this is the "cleanest" one. It's a GMB-486UNP V2.1
It had some battery corrosion, but it cleaned well with white vinegar. Now I'm trying to bring back that beast to life, and there are signs of hope !
after properly setting the jumpers and briging back some cache, the CPU heats up and my POST card displays something. It begins with "06" and quickly change to "0d". At this moment it stops ...
RAM doesn't seem to matter because whatever I do (even empty), this stays the same.
What's weird is that whenever I insert a VLB video card, the mobo acts dead-like ...
Here's the mobo
there might be a spot where something needs to be fixed, but there's something weird going on there, let me show you
The photo is not very clear, so I made a schematic :
this is how the traces go, 4 enter the corroded area and 3 come out ... I'm not sure why, one of them just seem to stop, there's no via there. What I'm totally unsure of is which of the two traces in the middle is the one that continues and which is the one that stops. So "1" is the first possibility of what's going on and "2" is the second possibility.
The previous owner attempted to fix this and have made a big hole there .. (maybe he ripped with a screwdriver ?)
Anybody has this mobo so I can compare ?
Edit: mobo seems identical to this one : 80486 BIOS image collection