Amiga 2000 problem

[gary2000]

Even though the angle of the photo doesn't show it, the corrosion seems to have reached up near pin one.  You could pull the CPU and examine the sock et.  

I have one that I had to replace the socket on that had similar damage.

[toples50]

I wil post more detailed pics later this week.

[Oldsmobile_Mike]

You've posted pictures from every angle except the one that would actually show the damage.  

You'll probably need to remove the CPU for a thorough cleaning, and/or replace the CPU socket, if corrosion has reached it.  Perhaps trying with a CPU card installed, which disables the built-in 68000.  Slim chance this might help with your diagnoses...

[toples50]

Some more pics from the Amiga.

[Oldsmobile_Mike]

As you can see for yourself, you're definitely going to need to remove and clean or replace your 68000 socket. Check continuity on that resistor and other components, as well.

Edit:  That 68000 looks like crud, too.  It can probably be cleaned, but might as well just pay the $5 bucks for a 68010 on ebay - they're 3-5% faster and allow you to make use of things like the 'Quit' key in WHDLoad software.  

[magnetic]

Hi,my beloved Amiga 2000 does not work.I have removed the battery I washed the motherboard in dishwasher but nothing.It can't boot.I have either grey or blue screen floppy drives does not make the usually sound and also I can't boot with the combination ctrl+A+A.
I need help because I have the Amiga since 1992...I can provide pics if necessary.

Sorry to hear of your amiga trouble. but for all readers here PLEASE DO NOT WASH YOUR AMIGA MOTHERBOARDS IN DISHWASHERS I DONT CARE WHAT YOU READ ON FORUMS!

[toples50]

I don't think damaged from dishwasher.I think the problem was the battery.Now what can I do?

[Dandy]

...
I washed the motherboard in dishwasher but nothing.It can't boot.I
...

[sarcasm]
You just washed it in a dishwasher and expect it to work?
No way - a dishwasher treatment is not sufficient.
Nah - you need to use a sandblaster to do the trick...
[/sarcasm]
:roflmao::laughing::laugh1:

[guest11527]

I don't think damaged from dishwasher.I think the problem was the battery.Now what can I do?

 The best option is probably a professional repair service. However, if you want to solder yourself and except to have some fun with it, here's what I would do:

 First, remove the CPU socket and try to get a new one. This one looks really damaged. Try to clean the CPU pins as good as possible. The pins cannot make contact in the shape they currently are. An eraser might be useful to get some of the oxygen from the pins. They should be metal-blank, not copper-green as they are now.

 Following that, try to check all the traces on the board. The way how they look is a good indication that some of them are dead and not connected to anything. You probably have to replace some of them with jumper wire to make them work again.

[EugeneNine]

And these big sockets, since it may already be damaged are easiest to remove destructively.   Put something under to protect the board and pry the plastic off the pins.  Then you can easily desolder one pin at a time.

[Dandy]

...
An eraser might be useful to get some of the oxygen from the pins.
...

You mean "oxide", don't you? (Oxygen = Sauerstoff)

[spaceman88]

I don't think damaged from dishwasher.I think the problem was the battery.Now what can I do?

The battery no doubt was the cause of your problem, just hope the dishwasher didn't introduce more problems. The biggest problem is how fast you can get it dry. If you have drops of water, say, inside a socket for hours or days, not a good thing :-(.

[paul1981]

Looks to me like you need to clean the socket contacts and CPU pins, probably nothing more.

[guest11527]

Looks to me like you need to clean the socket contacts and CPU pins, probably nothing more.

I doubt that the socket can be cleaned to the degree that it can be made working reliably again. No matter about that, it's a cheap replacement part. The problem might be to solder the corroded connections.

[paul1981]

Yes, I agree after looking at those photos again. If the CPU contacts are perfectly clean (use emery cloth), and if the green contacts are cleaned (use finest flatblade screwdriver to score a clean contact on each pin) then it would probably work but yeah, to replace the socket will surely be more reliable.

It's a stark warning though isn't it, to never ever under any circumstances neglect batteries or electrolytic capacitors. I'm guilty of it too, I have systems I need to check and recap both Amiga and others, and I bet I'm not alone either in this respect.

[QuikSanz]

And these big sockets, since it may already be damaged are easiest to remove destructively.   Put something under to protect the board and pry the plastic off the pins.  Then you can easily desolder one pin at a time.

Easy way is to flush cut the legs to get the socket out of the way, then use a solder sucker to suck them out of the board one at a time.