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Ralph Mowery

In article ,
says...

Is this problem too easy for you guys? I know I'm not up to the
level of most of you, but I'd appreciate some help?

I have a pair of computer speakers and the left? one, the one not
directly connected to the computer, makes no sound.

The wire must be good because its LED goes on. I finally got it apart
(it was glued together) and it has very few parts. The speaker
measures 4 ohms and all that leaves is the wires, the tiny pcb, the
LED and one 1000uF 16v cap. It seems that all the sound goes through
that, is that right? So it could be the problem that it's open.

How come a cap is needed? To protect the sound card? 4 ohms is not
enough to protect it? Speakers can short?

Some amplifiers have the output that must be above the DC ground so the
capaciotr is used to pass the audio but block the DC.

That is for the output there will sometims be two transistors sort of in
series between the plus and minus of the power supply. If you short or
have a low value of resistance such as the speaker from that point to
either the supply voltage or the ground it will blow the transistor, so
the capacitor is used.

You could have a bad capacitor, wires, or the amplifier is bad.