I and everyone else here can supply you with a wide range of options to repair with. There is nothing you lose by buying yourself out of a job like this beyond a strong sense of self-accomplishment and saying "I fixed that". You have made it quite clear you wish to take the boards under the iron and rebuild the system. We will help answer whatever questions you have to succeed in this without immediately recommending whole-unit replacement parts that are dubiously priced, regardless of the vendor.
Plus, there's always tome to learn new soldering tricks.
Oh, yes, I am one who prefers to try this type of thing myself, and I will get far more enjoyment out of the repair than I ever will using the thing. I was just pointing out that many don't, and it's great that there is a place for them to get parts, regardless of how dubious any of us feel the pricing maybe. One less machine chucked into e-waste due to lack of parts is one more piece of history saved.
Ok, back on topic. I have not found schematics for this particular IO board (650-0142-F), but have found a board layout for a very close one (
650-0142-E) and the schematic to what looks like a fit (
050-4008-H), though I suspect that it maybe for the first version Lisa (based on the part number). Not entirely sure how to verify it's correct, so looking through some of the BOM.
My questions now are:
1. How easy will it be to replace the 3 ROMs at the top
right left of the board? I can't imagine the images will be hard, but actual parts?
2. How about the 6552s for the Parallel port and Keyboard? And the 8530?
3. And then how about the COP421? That appears to be a micro controller, so I am also wondering about programming it (assuming I can still get one)? Is that TLC-866 type programming or something more complicated?
4. And of course, does one have part numbers or a source on any of these?
The rest of the missing parts are very straight forward components, mostly just caps, some resistors, transistors and what I think are oscillators (Y1, Y2 and Y3). There is a broken diode looking thing, marked as C10, but definitely not a cap as the name would imply, I need to find that on the schematic to confirm that it's what I think it is (a Schottky diode). That said, looking through the schematics I do have, this is gonna be quite the challenge to work out the values of these components, especially if I can't find closer matching schematics.