Amiga 2000: No Sound

[Fester]

Hi there,

The sound on my Amiga 2000 just stopped working suddenly. There's no sound to the 1984's speaker and the RCA out is dead silent too.

Fester

[Ral-Clan]

Does your floppy drive still work?  It might be that the Paula chip is having problems.  Otherwise it might be something in between the Paula chip and the sound output jacks (I'm not sure if there is some sort of pre-amp to bring the sound to line-level or not).

[amiga_3k]

Paula probably is it. On the other hand... a drastic change in weather could cause sudden corrosion on connectors. So you could try some contact-spray on both the connectors on the A2000 and 1084. Have you tried a known good audio cable?

[Fester]

Hi there,

I tested with good audio cables. My floppy disk drives, two internal and one external all work fine too. So if the Paula chip is on permanent vacation, does anyone know if is it easy to replace?

I'm asking before sending it somewhere...

Fester

[humppa]

It could even be a problem with the -12V line of the PSU. If the PSU is lacking -12V or the current is somewhere interrupted, the result is broken audio (most of the rest is working fine). I once had exactly the same problem.

[Fester]

humppa wrote:
It could even be a problem with the -12V line of the PSU. If the PSU is lacking -12V or the current is somewhere interrupted, the result is broken audio (most of the rest is working fine). I once had exactly the same problem.

Cool. I could tinker with that. I have an extra PSU.

[humppa]

Cool. I could tinker with that. I have an extra PSU.

Or measure the old PSU before removing it. Alternatively, you could check for -12V on the serial port (Pin10).

[Tomas]

No battery leaking either?

[arkpandora]

I have recently experienced weather effects on my A600's audio : since a night spent in a cold room with open window, the right audio channel sometimes goes out or makes noises, and on this right channel the audio filter has no effect anymore.

[amiga_3k]

Low temperatures and high humidity never are good things to have a computer operating in. Make sure it's dry again and use little contact-cleaner to get out any damp on the connectors.

[Fester]

arkpandora wrote:
I have recently experienced weather effects on my A600's audio : since a night spent in a cold room with open window, the right audio channel sometimes goes out or makes noises, and on this right channel the audio filter has no effect anymore.

My sound just died instantly between reboots. It went from working to not working at all. There's some good suggestions in this thread. I'll be tinkering with this over thanksgiving. Thanks all!

Fester

[Ral-Clan]

The Paula for an A2000 is not too hard to find.  In fact, you can use a Paula from an A500, which are very common on Ebay (and not too expensive).  I'm sure some Amiga dealers also have the Paula chips themselves for sale.

Actually, I think the Paula chip remained virtually unchanged in all the Amiga models....so you might be able to use any Paula chip in your A2000.  But check into this before you use one not from an A500/2000.

Also, try reseating your Paula chip (just press down on it after you have grounded yourself to prevent static electricity from ruining it).  It might have become unseated through the years (temperature extremes, vibration, etc.).

[amiga_3k]

Fester:

Did the machine reboot at will or did it decide to reboot all by her self? If the decision was made by the Amiga  and not by you pressing the three keys then you're into a nice little puzzle :-(.

[Fester]

amiga_3k wrote:
Fester:

Did the machine reboot at will or did it decide to reboot all by her self? If the decision was made by the Amiga  and not by you pressing the three keys then you're into a nice little puzzle :-(.

No the machine didn't reboot on it's own. I just noticed the sound was dead the next time I used the computer.

I ordered a new Paula chip from softhut.com just in case. The motherboard and chip are clean. There doesn't seem to be any seating problems or looseness. I'll test PSU voltage sometime today when I get around putting a new battery in my meter.

Fester

[TheWizard]

Is it possible that the RCA contacts on the motherboard are cracked?

The Wizard