On first starting the machine (VGA connection), the lights came on, but no display (which I initially considered might be a VGA mode issue). But on powering up again I held down Delete and this time it booted into the OS. This was the first indicator that the battery was corroded, leaving me to wonder how bad.
Turns out pretty bad! It was a little awkward to get to (and annoyingly I didn't realise I'd scratched the PCB as well getting it out). Following the usual advice I took distilled vinegar and a toothbrush and treated the area until the fizzing stopped after repeated treatments. I then cleaned the vinegar off and finished up with a general IPA clean of the PCB. I suspect the nearest port is probably done for, but by and large the other components seem to be in fairly good condition... except...
Whilst doing a Q-tip clean with IPA around the components, a couple of the Capacitors on C88 and C90 have come loose. (and my suspicions about C93 - indicated with arrow, turned out true also as that also came right off with little pressure).
It's difficult to tell at the moment visually whether the pads are destroyed, but I have a good friend who is familiar with recapping who believes it may still be possible to do some repairs if they have indeed come off.
I'm currently making an inventory of the replacements required and will hire him to do the work as I'm more software than hardware savvy.
PLANS (Assuming Refurb goes well)
- Good Clean (in progress) but no retr0briting (I rather like the yellowed look).
- Install CR2032 (with diode) to restore CMOS functionality.
- Install a CF Card on the IDE port as a HDD.
- Upgrade the RAM (currently slots are empty)