Reply 4100 of 4404, by Luke4838P
Here i will post my newest addition to my collection.
The motherboard seems to be identified as "4SGS-3VL".
An old 486 socket 3 motherboard, that needs repairs and troubleshooting.
Bought online, and it's quite obvious that something is quite wrong with it.
The motherboard is a generic socket 3 motherboard, but that has a CR-2032 holder for the CMOS battery, the problem is that seems someone had tried to solder a Ni-Cd rechargeable barrel battery, and the battery has leaked.
The person that made the modification, didn't check that there was no circuitry to recharge the battery, there's no resistor nor diode to the + battery pole.
There's rust in some points, but in good condition otherwise.
JP-17 is broken, and i have no idea what it does.
From the jumpers, it seems that originally this motherboard housed a 486DX2-50.
The motherboard seems to have received bad repairs, as there's a loose capacitor soldered near the CPU that is about to fall, and the traces near it seem damaged by a unexpert handiwork.
Also the barrel battery has clearly been added later by the same hand only to be removed later, as there are huge solder points where the barrel battery used to be.
The trace under the battery was completely green, but cleaning with vinegar and alcohol show that the damage isn't bad as i thought, as the trace seem to be still there under the gunk.
Cleaning isn't done yet, but is looking way much better than at the start.