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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: bitman on May 27, 2010, 12:30:30 PM

Title: A4000 almost no sound
Post by: bitman on May 27, 2010, 12:30:30 PM

Was about to test tracker hero on my A4000 when i dicovered that the sound was missing. I can only hear the sound very little if I turn up my speakers to MAX besides the that there is also a lot of noise in the speakers - any suggestions on what could have been blown up?
 
Playing modules or other sound-related activities has same problem - sound only hearable if speakers is on MAX.
 
And the speakers works fine with my other Amiga's

Title: Re: A4000 almost no sound
Post by: demusse on May 27, 2010, 12:33:35 PM

http://www.amiga.org/forums/showthread.php?t=41357

Title: Re: A4000 almost no sound
Post by: Everblue on May 27, 2010, 12:33:59 PM

Hmmmm sounds like leaking capacitors.

Title: Re: A4000 almost no sound
Post by: tokyoracer on May 27, 2010, 12:34:21 PM

Chances are your caps have become defective. I'd suggest opening up your 4000 and look closely at the motherboard for any signs of 'sweaty' or 'leaking' caps.

Title: Re: A4000 almost no sound
Post by: bitman on May 27, 2010, 10:47:58 PM

Took a look at the capacitors, cleaned the motherboard and "poked" the capacitors - and sudddenly I got sound again. So yes it's a leaking capacitor problem.
 
Found a guy who sells those capacitors:
 
http://www.amigans.net/modules/newbb/viewtopic.php?topic_id=3921&forum=7

Title: Re: A4000 almost no sound
Post by: davideo on May 27, 2010, 11:42:57 PM

I've got to do mine this weekend because I've lost the right channel :hammer:

Dave G :cool:

Title: Re: A4000 almost no sound
Post by: Drummerboy on May 28, 2010, 01:42:59 AM

Sorry men.. Capacitors problem.. Thats another Amiga´s Nightmare..
The other.. Battery´s leak..

Title: Re: A4000 almost no sound
Post by: whiteb on May 28, 2010, 02:00:42 AM

Quote from: bitman;561427

Took a look at the capacitors, cleaned the motherboard and "poked" the capacitors - and sudddenly I got sound again. So yes it's a leaking capacitor problem.
 
Found a guy who sells those capacitors:
 
http://www.amigans.net/modules/newbb/viewtopic.php?topic_id=3921&forum=7

That is all very well, but you have to be good at SMC too :)

in fact *ALL* the caps on the motherboard need to be replaced as they ALL can spew.  Also, you need to desolder U402 and U403 as the acid can get underneath them.

I got someone local to me in Australia to do ALL my caps and battery.