Okay people:
That is my first try to diagnose and restore (if crucial, however provided that crucial) any obvious faulty (or quickly prone to grow to be faulty or fail) elements on a Mac Plus authentic analog board.
Proper now, the analog board is working (it is powering and offering sign to) a Mac Plus (1988) that I bought for $200 ($100 plus $100 transport) that initially had a Unhappy Mac ROM failure black display screen.
I put in new ROMs, upgraded the logic board to 4 MB and the unhappy Mac turned very glad and booted superbly. The logic board is in close to pristine situation, and aside from the faulty ROMS which have now been changed and the board upgraded to 4 MB, every thing runs easily and with none hiccups.
The display screen is ideal, no pixel failures or fade strains or different issues and the one teeny, weeny concern is a barely imperceptible distinction within the width between the left black margin and the correct black margin.
The opposite concern is that the inner floppy drive, which works superbly and accepts disks and reads them faithfully, is reluctant to let go of disk after we try to eject the disk and must be prodded with a push pin. That is within the strategy of being fastened and we’re positive {that a} absolutely practical drive can be absolutely repaired in brief order. No worries there in any way.
Nevertheless, what we might actually use some assist with is the analog board. Whereas the analog board is ok and each powers and gives sign to the Mac Plus at the moment, we see that it’s the unique analog board and does not seem like in fairly a close to excellent situation because the logic board. Whereas it’s absolutely practical, we’re nervous that, maybe, simply maybe, a number of capacitors could also be nearing its finish of life and should be changed and repaired.
We have supplied a bunch of images to offer you a greater thought of what situation it’s at present in.
Wouldn’t it be an excessive amount of to ask you people to have a look and tell us should you see factor(s) fallacious with the board that wants repairing earlier than we try to promote the re-assembled Mac Plus to some poor, unsuspecting purchaser. We all the time need our prospects to be glad and by no means need them to be unhappy with any buy they make from us.
Thanks for having a look and declaring something you observe that will want consideration.
Sincerely,
Butch
Footage of Analog Board – Completely different Angles:
