A2000HD Freezes

[adz]

Hi

Recently, whenever I push the joystick button on the joystick connected to port 2, my whole system freezes. System specs are as follows;

A2000HD
3MB RAM (1MB Chip, 2MB Fast)
A2091 SCSI Controller w/50MB Quantum HDD
Int FDD
1.3 - 2.0 Kickstart Switch (happens with either)

I havn't used the system in a long time, and I have a feeling that one of the custom chips may not be contacting correctly. Can I do the drop fix on this thing to eliminate this possibility, or am I heading down the wrong path. Any  help would be greatly appreciated.

Regards

Adz

[adz]

Hi all

Thanks for all your tips. I have already tried pressing down on all the chips, no luck. Sadly, it has been about 10 years since I last used an Amiga, and all my knowledge of their hardware has gone by the wayside. Would I be able to strip an A500 for the 8520 chips? Thanks.

[adz]

Oddly enough, I am now noticing that I occasionally get a green screen if I try and reset the system with the keyboard when it has crashed, from memory, that indicates bad ram. I hope this isn't the beginning of the end for my A2000.

[adz]

I've just gotten home and had a look at the battery, and it is slightly corroded along with mild discoloration of the board. The damn thing doesn't want to come out. When I do get it out, I was going to hit the area with some CRC, unless of course you guys suggest something else. One other thing, those 8520 IC's don't wanna come out easy either, just have to keep working. At least I hafe something to do now.

[adz]

I actually have an EEPROM puller, but its really tight, and I don't want to damage anything, I guess I'll just have to take my time, damn inpatience. As for the battery, it is actually corroded in. What would you guys suggest for cleaning up the board?

[adz]

Thank you everyone for all your advice, sadly my level of skill isn't that high when it comes to the Amiga  :-(, at least I have now got a little project to keep me occupied.

Regards

Adam

[adz]

Agnus is firm and secure, me thinks the fact that it green screens after it has lock up, may be something to do with the dodgy 8520 causing mem errors, just a guess, because that is the only time it green screens. Unless dodgy memory is causing the joystick buttong freeze in the first place. Who knows, gonna take me a while to figure this one out I think.  :-)

[adz]

Keyboard is fine, and the problem happens with any device that is plugged into port two. Aside from the joystick bug and the dodgy battery, the system is fine. Should never have left it in the cupboard in the first place. Live and learn.

[adz]

Hi again, I'm going to pick up an A500 this weekend, I'll try swapping the 8250's and see what happens. Does anybody know of any decent RAM/hardware testers that I can download, that will work with WB 2.1? Also, does anybody know the maximum size HDD that will work with the A2091 controller, cause I have an old 2GB SCSI drive lying around somewhere. Thanks again for all your help, to be honest I cannot believe how helpful everybody has been.

[adz]

Hi all

This was my second post on A.org and I just thought I'd let you all know that I finally got round to fixing my A2000HD, replaced both CIA's and de-solderd the battery, system works 100%.

Hey this post even has some of DoomMasters early posts in it, I think that was the first mention of "professional", anyway, thanks all. :-) :-) :-)