A3000 repair

[Acill]

A3000 issues like this a really hard to nail down. Its one of the few machines I despise working on. I have been able to fix several, but with acid it can be deep issues in that area. I would start with pulling all the chips and making sure 100% of the traces to all sockets are good. You can find the schematics online here: http://www.amigawiki.de/doku.php?id=en%3Aservice%3Aschematics

[Acill]

Do you have a CPU board you can test with? Replacing the soldered on 030 is difficult but not impossible on the 3000. USe a hot air desoldering station if you attempt it and try using some of the chipquik stuff. It makes it very fast and easy, but its messy to remove that junk once done.

[Acill]

I think the code is available from Dave Haynie's site. I will look when home from work if you cant find it. I know he released the code for the 3640 boards.

[Acill]

Well I got the new GAL16V8D's and programmed them with the code I found for the A3000 PALs. Unfortunately, it made no difference, although they do run quite a lot cooler than the old PALs did. Looks like I need to wait for the EPROMs to come so I can make some test ROMs. Hopefully, that will provide some clues of what to check next.

That test ROM is John Hertell's work. He is a good friend of mine from Sweden. If you join the Commodore Amiga group on Facebook you can get in touch with him and get some direct support. The ROM works fantastic too, and he updates the code a lot, so plan to reflash that eprom several times, lol!!

[Acill]

Look for Dave Haynie on Facebook. This was his baby after all. He would have some good input to offer if you ask him I bet.