Yorkville LS801P

[bsco]

Hope this helps somebody out...Had this unit and when you plugged anything into any input you would get a hum in the speaker.....If there was nothing plugged in then it was hum free......Found an small inductor on the pre-amp board.....labeled R204.....this was open circuit......and this is the ground for the inputs....Hope this little bit of info helps somebody out in the future.....
Cheers,
Bernie