10 replies to this topic

[Syfo-Dyas]

I had posted this on Amiga.org, but conversation there seems to have died down in the past few days and I'm still left clueless.

What happened is that I ordered this 2000 off of Ebay:

eBay Auction -- Item Number: 180708385429

It arrived and with a few extras that were not listed so over all I was happy...

at first.

I quickly realized that the DataFlyer had came loose and had been sliding around on the inside of the 2000.

I removed this and had to straighten a few pins, but other than that nothing appeared to be damaged.

On the mother board was a MegaChip and a Kickstart switcher (I forget the official name).

I booted up the machine and to my surprise I was greeted with a Green screen.

I powered down, removed everything but the Floppy drive from the board, pressed down all the chips, etc. Same results. Green screen.

I then noticed that the battery had leaked on the board. I clipped the battery then used Alcohol and Vinegar to clean the socket and pins for the 68000 and the Agnus.

After drying things out with a dry rag and my air compressor I was able to boot to a yellow screen.

I then pressed the 68000 down a bit more and was then able to boot to the screen asking for the WB Floppy.

I then left home to update the original thread in which I was trying to trouble shoot my issues. Hurray, I was on my way!!!!

I then came home and fired up the 2000 again but was back to booting up to the green screen where I began in the first place.

I had someone send me an Agnus chip to put in place of the MegaChip, but still I get that green screen. :/


I have included two photos of the Battery Leakage area. One from before the clean up job, and one after.


I'm thinking that maybe I need to find a professional electrician within the states to work on this? I mean if it is going to go from booting to a green or yellow screen that easily, I'm thinking that there is nothing I can do to make it as stable as it should be.

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[gibs]

Hi there

A green screen means that there's a problem in the Chip Ram.
A yellow screen means that an error has been detected in the 68000.

You need to check if your battery hasn't damaged some tracks, and that the 68000 socket is still good. From what I've seen in your 1st picture I would replace it. must be rotten under the socket.

Edit : You can also see that on the board all the solder points on the right are shining, those who aren't (on the left) have been attacked by the acid of the battery. the half of your socket has also been attacked, and maybe it's not very conductive.

If you own a ohm meter, remove the board, put back the cpu and test that each legs are conductive to the other side of the board.

Edited by gibs, Thu Sep 1, 2011 7:58 AM.

[save2600]

What gibs said. You definitely need to remove that battery, clean the area, check for continuity along the tracks and replace the cpu socket.

[gibs]

I have inverted Right & Left ^^
Well this amiga seems pretty easy to fix.

[Syfo-Dyas]

Alright, thank you.

I have removed the battery, and have cleaned up the area as best I can with Rubbing Alcohol, Vinegar, and the like, then cleaned it all up with water afterwards.

In regards to checking for continuity on the other side of the board...

...where should I put my Positive and Negative ends to testing? I'm not much more than an amateur electrician, very amateur at that.

[save2600]

Syfo-Dyas, on Fri Sep 2, 2011 4:21 PM, said:

...where should I put my Positive and Negative ends to testing? I'm not much more than an amateur electrician, very amateur at that.

Just follow traces with your eyes and put your leads on the nearest component points.

[gibs]

you can start a simple thing like I said earlier: check the continuity from each legs of the top side 68000 to his solder point beneath the mainboard.

if the battery has leaked only in this area, the problem is probably there.

another idea, you can also use a needle and scratch the conductive parts of the socket which has been damaged...at least the ten ones on the right (both sides)

Edited by gibs, Fri Sep 2, 2011 5:14 PM.

[Syfo-Dyas]

gibs, on Fri Sep 2, 2011 5:10 PM, said:

you can start a simple thing like I said earlier: check the continuity from each legs of the top side 68000 to his solder point beneath the mainboard.

if the battery has leaked only in this area, the problem is probably there.

another idea, you can also use a needle and scratch the conductive parts of the socket which has been damaged...at least the ten ones on the right (both sides)

Aghh, OK, I see what you mean. Don't know how I missed that before.

[gibs]

Syfo-Dyas, on Fri Sep 2, 2011 5:15 PM, said:

gibs, on Fri Sep 2, 2011 5:10 PM, said:

you can start a simple thing like I said earlier: check the continuity from each legs of the top side 68000 to his solder point beneath the mainboard.

if the battery has leaked only in this area, the problem is probably there.

another idea, you can also use a needle and scratch the conductive parts of the socket which has been damaged...at least the ten ones on the right (both sides)

Aghh, OK, I see what you mean. Don't know how I missed that before.

let me know

[Syfo-Dyas]

I'll let ya know. Gotta remove the Mobo....

...been busy setting up Amithlon.

[gibs]

Syfo-Dyas, on Tue Sep 6, 2011 11:50 AM, said:

I'll let ya know. Gotta remove the Mobo....

...been busy setting up Amithlon.

ok lol