Amiga 3000 acting up resistor

[spudje]

I recently acquired a nice Amiga 3000 Desktop. I first had it checked and recapped. There it was noticed that R403 or R404 was burnt. So the resistor was replaced. However, after turning on the Amiga again the resistor burnt again straight away. The guy who did the fixing is very knowledgable on Amigas but couldn't find the cause.

I only quickly checked sound with the boing ball demo. It works, it might be a bit less clear than I'm used to and there seems to be some noisy echo. But that can all be due to bad cabling outside of the Amiga, or due to interference with other equipment since the box was open and other computers were running.

Maybe someone here knows what could be the cause of this? Thanks in advance!

[spudje]

Thanks a lot guys! I have some pointers which I'll take with me when asking an "Amiga Guru" to look at it.

[spudje]

So what should it be then? 1 or 10 Ohm?

[spudje]

While it seems now audio is fine and it was just the boing demo sounding a bit distorted I might just keep it as it is. If I do decide to have it fixed you guys have provide a lot of valuable input.

I very much doubt the capacitors are causing this, as they have been replaced by someone who very much knows what he's doing, hence the decent soldering work.

He thought another possibility may be some (voltage) faults inside any of the custom chips.

I guess I'll also check with Haynie at Amiga30 this Saturday