Okay people:
That is my first try to diagnose and restore (if obligatory, however provided that obligatory) any obvious faulty (or quickly prone to turn into faulty or fail) elements on a Mac Plus unique 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.
I put in new ROMs, upgraded the logic board to 4 MB and the unhappy Mac turned very blissful and booted superbly. The logic board is in close to pristine situation, and apart from the faulty ROMS which have now been changed and the board upgraded to 4 MB, all the things runs easily and with none hiccups.
The display is ideal, no pixel failures or fade strains or different issues and the one teeny, weeny subject is a barely imperceptible distinction within the width between the left black margin and the appropriate black margin.
The opposite subject 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 means of being mounted and we’re positive {that a} totally practical drive shall be totally repaired briefly order. No worries there by any means.
Nonetheless, what we might actually use some assist with is the analog board. Whereas the analog board is ok and each powers and supplies sign to the Mac Plus these days, we see that it’s the unique analog board and would not look like in fairly a close to excellent situation because the logic board. Whereas it’s totally practical, we’re apprehensive that, maybe, simply maybe, a number of capacitors could also be nearing its finish of life and must be changed and repaired.
We have supplied a bunch of images to present you a greater thought of what situation it’s at present in.
Would it not be an excessive amount of to ask you people to have a look and tell us in the event you see factor(s) flawed with the board that wants repairing earlier than we try to promote the re-assembled Mac Plus to some poor, unsuspecting purchaser. We at all times need our prospects to be blissful and by no means need them to be unhappy with any buy they make from us.
Thanks for having a look and stating something you observe which will want consideration.
Sincerely,
Butch
Photos of Analog Board – Completely different Angles: