500+ no sound

[curtis]

Another day, another snakebite!

Working on a 500+ rig and set up a set of speakers and fired it up.

No sound.

Hmmm, maybe a bad Paula?  Swap with a known good, no joy.  Try original chip in another 500 mobo and it works.

Suggestions?

[curtis]

Used the same speakers on both units.  

Works on one, but not the other.

No other issues.  Everything else is good.

Any other issues or just no sound?  Probably obvious but you've confirmed the speakers and wiring are working, yes?

[curtis]

Different power supplies.

I seem to remember having audio problems with a bad -12v connection from the power supply on an a500, when you tested with the other machine was it using the same PSU?

[curtis]

Well, after a good nights sleep and an chance to ponder it a bit, my eyes were opened!

I had forgotten when I picked this up, the previous owner told me there had been some battery damage before he removed the old leaky battery.

So, looking at that area which is where the audio filter circuitry sits, I noticed remains of battery damage that has been cleaned up, but not repaired!

Hmmm.

Yeah, I kinda feel stoopid!

I'm including a picture...

[curtis]

Well, I did have 3 other senses working at the time.

Smell, no burning odor!
Sight, no smoke!
Hearing, no sound!
Why would I need to look at the actual motherboard?

:laughing:

Erm... Yeah!! Always perform a visual inspection before anything else.

[curtis]

Yeah mechy, it's the same board.

Actually, I've got a 6a I'll probably use instead and will see if this "silent" partner can find a new home...

[curtis]

That will be up to the new owner.

Yeah, I've decided to offer it to someone new.

Check out the marketplace forum.

Maybe you could bypass the audio filter circuitry?