First post, by ChrisXF
Hi everyone! Long time lurker, first time poster!
I'm currently trying to revive a um4981 motherboard that I found in the back of a cupboard in my hardware lab. It's missing a few components, and I'm wondering if anyone could help?
I know there's not going to be a schematic of BOM anywhere probably, but the parts I'm missing should have readable numbers on if anyone has one of the boards and wouldn't mind checking?
Ok, here's the board:
And my specific query would be, what transistor and crystal are missing here?
I'm thinking it's probably just a standard watch type crystal and maybe a generic TIP31C or equivalent transistor?
If anyone could check that would be awesome - every picture of this board I've found has the parts obscured by a heatsink, 🤣.
Thanks so much,