Amiga 2000 Black Screen Repair Help

[giZmo350]

Welcome minimojoman!

I just went through this 12 days ago and it is definitely CPU/CPU Socket related. My A2000 motherboard had suffered leaked battery corrosion maybe 10/12 years ago. I bought it off eBay that way maybe 8 or so years ago. I cleaned all the corrosion up as soon as I got it and it worked for quit a while but, years later it died again with black screen symptom. I would push and jiggle the CPU until it would post again every so often. I finally got around to pulling the MB again and the corrosion came back (with no battery for 8 years!) and was in the CPU socket pins and underneath too. I replaced the CPU socket and still black screen. I knew it worked before so I didn't bother with swapping IC's. Went straight to checking continuity from CPU socket to every location on the MB. I eventually found the problem using the schematic. I have a Rev6a board. However, the schematic might help on a rev4.1 board.

Here's my related post.

http://www.amiga.org/forums/showthread.php?t=73370

Read carefully as it will give you a hint on how to correctly read the schematic. A link to the schematic is in the post. Print it out to make things much easier and it really helps if you have a DVM with a beeper when checking continuity.

Good Luck and again welcome to Amiga.org!

[giZmo350]

Would placing a DiagRom in the kickstart socket be of help here?

As long as the CPU is still functional and has power, I'm sure it would. That's a good suggestion!

[giZmo350]

I'm thinking you should also consider ROM socket replacement. It's very rare when ROM itself is at fault. I have rev 6 mobo which had same kind of behaviour so I only replaced this socket and that helped. Did you try pushing on ROM chip while starting machine?

http://www.amiga.org/gallery/images/5165/1_ROM_socket.jpg

Yea, that's probably a good idea too if it has corrosion around it.

This ebayer sells DiagRoms occasionally but this listing has ended. Might want to watch this seller for another listing.

https://www.ebay.com/itm/Amiga-diagnostics-for-A500-A600-A2000-DiagROM/152932817977?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

[giZmo350]

Thanks! Yeah I love this desk, it has a wood pullout tabletop thingies on each side right above each drawer, I really like that feature!

Yea, might want to put a temp support leg under that "wing"!

Thanks for all the help, my customer was super stoked to get his Amiga 2000 back in working condition! :-D

Getting the job done is even better since it was a "customer's Amiga"! Glad you got 'er fixed and back together!

Pulled out my Amiga 1000 to help with the repair and now I want to setup my Amiga at home in a dedicated spot for gaming!

Keep 'em running!

Also just found the archive of 12,000 disk images that were backed up so ill be having some fun soon :-D

You might look into (if you're not already) registering over at English Amiga Board http://eab.abime.net/ . They now have a separate section for anyone to upload their Amiga Images - you will make some Miggy Peeps very happy over there with 12K of disk images! :lol: