A2000, leaky battery?

[Smiley]

Hi, just got my A2000. Wondering if my battery is corroding my mobo or not? Seems that its got some white stuff on it and has blue patches around it.






Should I chop off the battery? I dont need the time anyway.

How can I clean up the blue stuff?

tnx

[BarrySWE]

take the battery away!!!! NOW!!
or your board will be dead anytime

[Unknown_K]

Remove the battery and clean that blue crud off the motherboard since it will continue to eat into the circuits.

[Smiley]

Ok removed the battery ok. Removed as much of the blue stuff as possible. Any advice on how to remove all that blue gunk?

Tnx

[adgloride]

Your lucky to reach it in time, a leaky battery killed my amiga 500 plus. As I didn't know about it at the time.

[Smiley]

Ok, new question about my A2000.

I have a rev 6 board. I have this little green board poking out. Ive looked at loads of other pics of A2000 rev 6 boards and none of them have it....what is it?

Board pic from Amiga Hardware



My board




Cant find another A2000 board pic with this little thing on it. :s

[Heavyweight7t6]

Meths? or circuit board cleaner...nothing abrasive!. About your motherboard! I don't have a clue what it is! - tried taking it off?.

[a_petri]

Originally Posted by Heavyweight7t6

About your motherboard! I don't have a clue what it is! - tried taking it off?.

*DON'T* try to take it off! At least, don't try to pry it out!!! My A2000 (Rev. 6.0) also has such a thing, and it is definitely soldered in! (Two of the "IC sockets" on the extra PCB on the right side are actually 'pass-thrus' that are both soldered to the extra PCB and to the motherboard.)

From the available information (schematics and motherboard photos on www.amiga-hardware.com) I suppose that it is a "factory hack" - an undocumented production variation, probably related to the earliest Rev 6.0 A2000 motherboards.

The 'pass-thrus' connect to the places U540 and U541 on the motherboard - according to the schematics, these should be 74LS244 bus drivers, responsible for connecting the DRAM chips' address and RAS/CAS lines to the Fat Agnus.

I suspect that there were some minor timing issues with the first batch of 256Kx4 DRAM chips (the main novelty of Rev 6 A2000s was the application of 256Kx4 DRAMs instead of 256Kx1) and the C= production engineers covered it by tossing in this extra PCB with a few extra ICs but not documenting it, as they knew that the next batch of DRAMs would be better anyway...

[Smiley]

Originally Posted by a_petri

*DON'T* try to take it off! At least, don't try to pry it out!!! My A2000 (Rev. 6.0) also has such a thing, and it is definitely soldered in! (Two of the "IC sockets" on the extra PCB on the right side are actually 'pass-thrus' that are both soldered to the extra PCB and to the motherboard.)

From the available information (schematics and motherboard photos on www.amiga-hardware.com) I suppose that it is a "factory hack" - an undocumented production variation, probably related to the earliest Rev 6.0 A2000 motherboards.

The 'pass-thrus' connect to the places U540 and U541 on the motherboard - according to the schematics, these should be 74LS244 bus drivers, responsible for connecting the DRAM chips' address and RAS/CAS lines to the Fat Agnus.

I suspect that there were some minor timing issues with the first batch of 256Kx4 DRAM chips (the main novelty of Rev 6 A2000s was the application of 256Kx4 DRAMs instead of 256Kx1) and the C= production engineers covered it by tossing in this extra PCB with a few extra ICs but not documenting it, as they knew that the next batch of DRAMs would be better anyway...

Thanks for clearing that up