Dead 2000

[JuMa]

Try pushing/reseating all socketed chips especially Agnus. Might also be bad contact at cpu socket. Try cleaning it with contact cleaner.

[JuMa]

Like mechy suggested it might be problem with TICK signal at PSU. Try setting jumper J200 to internal TICK.

[JuMa]

Well, well. Looks like my A2000 died as well. First random freezes then just black screen. It has vampire intsalled. I removed vampire and installed 68k and rom. Now at power up it goes normally to insert floppy screen but when starting to load a game it freezes. If reset after that it (sometimes) goes to green or red screen and resets itself.

[JuMa]

Curtis
 2 questions

1. Is the PowerLed Dim or Bright?

2. Hook up a keyboard and press cap locks 10+ times does the caps lock light still light?

Since I have the same problem... In my case power led is bright. Caps lock lights about six times then it stops. Does it mean something?

[JuMa]

It

Check your CPU socket for green or if you have been using a vampire in it you may have bent them out to much. I've had to replace several 68k sockets for vampire owners lately.

I replaced cpu socket. At power on it goes to insert floppy screen but after  60 seconds or so it freezes. If reset then screen stays black or goes to white. If I turn power off and wait little longer like 10 minutes it boots to floppy screen and freezes again after a while.

[JuMa]

Do you have another kick-start ROM you can try?

Tried 3.1 rom no change. Just noticed that it actually doesn't completely freeze but disk animation slows down to crawl. Also drive click slows to about once per 30sec.

[JuMa]

I'm starting to suspect bad contact or trace somewhere. If I lift the board a bit or even tap disk drive instant restart/freeze. If trying to load a game it loads few secs but then stops.

[JuMa]

I am also leaning towards trying to remove every chip and clean with a toothbrush and 99% IPA. If you have a good disk washer after the chips are removed you can use it to run the board through a cycle as long as you let it sit on its side at an angle and dry out ofter for a few days.

That did it! I removed all socketed chips and put it on a dishwasher. Then cleaned with IPA. Also resoldered everything in cpu area. It's been up for a day running demos and stuff. No issues so far. Hopefully it will last.