»

[dougal]

Originally Posted by Jaycebot

I checked the traces, theyre fine. However, this morning, I powered up the amiga, and now im getting a green screen.

Iirc a green screen is an indication of faulty ram.

Did you try disconnecting all the Zorro cards?

[Framiga]

Originally Posted by Jaycebot

I checked the traces, theyre fine. However, this morning, I powered up the amiga, and now im getting a green screen.

check the vias as well. (the interconnections(sp) between the top and the back of the PCB)

[Jaycebot]

Yes, i disconnected all the Zorro cards, I get a white screen when they're removed.

Where are the vias located on the board?

[scuzzb494]

So it was working and now its not and remarkably by mucking around with items that you had not messed with before the things going to work. The clue here was the leaky battery and the fact that it had finally eaten enough of the board to bust it. Cleaning and removing won't solve the problem, no matter how thorough you are. If you are serious about the board then get it checked and the traces repaired cus that's the problem. Otherwise you will be likely to damage even more of the 2000 pulling stuff out and shoving it back in. Its an electrical issue and so get the board checked. The kit is old.

For me I tend to track down a working motherboard. Always works.

For anyone with old Amigas then do check them for battery leak and really always remove them if they are the barrel type. There are many ways to do this. I just rock them very gently backward and forward until they snap off. I use vinegar to clean and neutralise with baking soda

Amiga4k posted this some while bag on the forums..

The best way to neutralize the battery leak

(1) Remove the board
(2) Clean by either method with toothbrush, brushing in the direction of traces, NOT across them
(a) Spraying with vinegar
(b) using a 3 part Baking Soda and 1 part distilled paste
(3) use different toothbrush to rinse and brush with distilled water
(4) Use litmus paper to test for alkalinity. When the red paper remains red, the solution has been neutralized

PS I have had repaired boards sprayed with circuit board lacquer.

[Framiga]

Originally Posted by Jaycebot

Yes, i disconnected all the Zorro cards, I get a white screen when they're removed.

Where are the vias located on the board?

the vias are all over the board. The ones you need to check, are the one surrounding the offended area ( vias are that little round silver like things .... they are like bridges that interconnects traces between the 2 faces of the PCB and can be affected/corroted by the acid)

[Darrin]

Originally Posted by zipper

Haven't you learned yet?

What, that alkalines (above ph7) neutralize acid (unless the battery was an alkaline)?

What chemistry classes did you attend?

(I was trying to make the point humourously that it wasn't acid being cleaned up)

[Jaycebot]

Originally Posted by Framiga

the vias are all over the board. The ones you need to check, are the one surrounding the offended area ( vias are that little round silver like things .... they are like bridges that interconnects traces between the 2 faces of the PCB and can be affected/corroted by the acid)

Ok, Thanks! I'll check em.

[zipper]

Originally Posted by Darrin

What, that alkalines (above ph7) neutralize acid (unless the battery was an alkaline)?

That acid battery bull begins to irritate gradually - the only acid batteries an ordinary consumer meets are lead batteries in a car/motorcycle/whatever vehicle. All the others are alkaline by nature.

[Darrin]

Originally Posted by zipper

That acid battery bull begins to irritate gradually - the only acid batteries an ordinary consumer meets are lead batteries in a car/motorcycle/whatever vehicle. All the others are alkaline by nature.

I'll leave the humour to the experts in future.

[Jaycebot]

Well, I checked the connections around the battery area. They're all ok.
What if the problem wasn't the battery leakage?

[runholen]

Originally Posted by Jaycebot

When i went to power up the amiga 2000, all i got was a yellow screen with rapidly moving diagonal black lines. The harddrive light didnt come on, and it wont respond to a floppy disk in the drive. What in the world happened?

Hi there. Does the rapidly moving diagonal lines look anything like my rapidly moving black diagonal lines on my Amiga 500? (See my avatar image) I have a plain 500, so no battery damage. As explained in my thread http://www.amiga.org/forums/showthread.php?t=64775 I also sometimes get a green screen on boot, so maybe we have the same problem? Did you manage to fix Your Amiga?

[TjLaZer]

The A2000 is a tank and if a leaky battery ruins it, the leak was really bad as they are mostly the only big box Amiga to survive a leaky battery. Sounds like it needs traces and or sockets replaced. I would suggest you use the board for spare parts (the chips) and just get a nice working undamaged A2000 motherboard. Make sure you always check the NiCad batteries in the Amiga's that have them! As this will continue to happen if it hasn't already....

I recently got a A2000 for free, that was sitting in someones shed. The machine looks unused and was complete in box. It looks brand new. Battery leaked and ruined the motherboard. I tried so hard just as you did to resurrect it but in the end it did not want to work. Bought a replacement Rev 6 board off a forum member for $60 and all is good... Not even worth it unless you are an expect in such repairs!

[spirantho]

@Jaycebot

If you're in the UK I may be able to help as I do some repairs of this sort of thing (just resurrected a battery damaged 1500 a few weeks back).
As it's a company thing I would need to charge £50 though if I successfully fix it I'm afraid! PM me if you want me to have a crack at it.

[gertsy]

Green screen is supposed to mean an error with chip ram (sorry I missed the second page). Could be component damage from the acid. Check the power supply outputs (if you have a volt meter).

[spirantho]

Green screen is a Chip RAM error, yes... but it doesn't mean there's anything wrong with the Chip RAM, it just means that the CPU can't talk to it properly. It could just mean Agnus needs reseating, or (more likely) a trace that you think is ok actually isn't.
How did you check the traces? Remember that just because a trace looks good doesn't mean it is - you need to check with a multimeter. Also remember that the pins of the CPU next to the battery are the data lines. That means they're connected to more than one thing (the kickstart chip and the rest of the board in the other direction).