🚀 go-pugleaf

I am having a problem with my Mac that I hope some of you might be
able to help me with.

I am having serious problems with the sound on my Mac. I'll give a
detailed configuration below, but the main problems are that on the
Line Out connectors, I get a low frequency hum, and no actual sound.
On the internal speaker, and the sound out miniplug (for headphones)
I get light static (not so light with the volume on high). Additionally,
when I have the sound input on 'None', the static is louder. On all
other sound input options, it is softer, but not gone. The internal
speaker will still produce sound, but it sound 'broken' like a badly
tuned radio channel: it crackles and generally sounds bad.

I am fearing that my sound hardware has gone to heaven, at least
partly, but I am hoping that some of you might have ideas on how
to fix it.

My configuration is as follows:

The main machine is a PowerMac 7500, upgraded with a 120 MHz 604
processor and 256k L2 cache. It has 112 megabytes of main memory.
I have a lot of SCSI devices (3 internal, 4 external).

I have a video recorder hooked up to my composite video input port
and to my RCA sound input ports.
My RCA sound output ports are hooked up to my stereo installation.
Lastly, the audio output of an external CD-ROM drive is connected
to the 3.5 mm microphone input port.

All in all it was a very nice setup, but now I have to keep all
sound switched of to do any work on the machine, which does not
make me happy.


Thanks in advance for any help you can offer,

Maarten