Graphics problem on Amiga 2000

[Jupp3]

Hi!

I've got quite "basic" Amiga 2000, it's got 1MB CHIP, 8MB Fast, SCSI controller and a SCSI-HD, and that's it.

But the problem is, suddenly some rather strange problem appeared... I guess something is corrupting the CHIP memory, which can be seen as graphical corruption (and grabbed with screengrabber)

An example can be seen here.

It also seems to affect other things related to chip memory (when playing sid, for example, after a while some sounds will become corrupted and stay so... But when playing mods from FAST memory with Hippoplayer, all is fine)

So... Anyone got any idea, what could be the problem and the solution for it? :-)

I once took most (easily) removable custom chips from A500 and installed those into my A2000, but the problem seemed to stay...

I've also tried removing expansion cards, but that didn't seem to help either...

I'm not that interested in upgrading my A2000 in any way (except maybe a bigger HD) as I already have 2 far more powerful computers (my 060/PPC A1200 and G4 Pegasos 2), but wouldn't mind having it in fully working condition :-)

EDIT: The link should work now...

[Jupp3]

Meant to post a reply here earlier, but forgot...

Have you thought about booting into a plain WB to see if you could recreate the problem?

I think the problem occured also at the "Insert disk" -screen when booting without any expansion cards...

Can't recall the motherboard revision, but it's one of those, that have onboard B&W composite out.

And yes, there was some self made "memory expansion" when I got it, some wires connected to the base of some chip. But when I got it, I just removed them (previous owner said, that disabling it was required to use 3rd floppy drive) and in any case, it worked just fine for maybe an year after that...