I'm 90% certain that the problems i've got are related to the RAM onboard. Previously, i've been able to get the VIC to something like the boot screen, sometimes with text. It always crashed if I tried to execute a command. To try and solve this, i've replaced IC's 4,5 and 6 which are the memory control logic chips. This didn't seem to do anything, so I put the VIC away and left it for a while. When I tried to troubleshoot it earlier today, it wouldn't respond, and i'm now getting a blank (dark) screen.
Sooo, i'm thinking that the damaged RAM has finally given up the ghost, and needs replacing. I'm therefore looking for someone that can ship me a handful of MM2114N RAM chips for a late revision VIC. Obviously i'm willing to pay a reasonable amount for the chips and postage.
Alternatively, if anyone has a damaged motherboard they want rid of then I'd be interested in that also, as I could patch one together from the bits that work

Actually, whilst i'm on the subject of patching together, I still need the 1,2 and 6 keys for the keyboard, they're still missing too

If anyone can help me, i'd be very grateful!
Thanks,
Rob