Atari Mega ST 2 repair 

I enjoyed this very much. Thanks for putting it together. :)

The diagnostic cartrige would show you which RAM chip failed/MMU - over serial connection. You were lucky!

I miss my Mega ST2. The motherboard on mine looked like the one you picked up for a spare. Where the RAM chips are is an outline of where more chips could go. I soldered in sockets on all of mine and added more RAM and turned mine into a Mega ST4. I never had a color monitor for it. I got the monochrome monitor as I used mine for Desktop Publishing with PageStream.

Really nice video :) Atari repairs on ST line are not so common :) 5/5

Nice fixes there! That's quite a modified unit.

I bought a Atari PC back in 1987, still have it, and the motherboard looks a lot like the one in the video.

Lot of work for such old computer :-) But if you can get the megabit D-ram for low cost, why not upgrade the Atari to 4 MB? I believe it can be done with the piggybank method ;-)