tried cleaning the jack as you said still with same problem of loud mains
hum
just looking on the cicuit board and there is a small component tda2030a,
amplifier i think, that has 4 small burn marks around its solder joints on
the pcb could that be the culprit would that cause the symptoms

cheers
Dave



"Dave" wrote in message
m...
Hi
i have a sound king skak20ra guitar practice amp
worked fine for ages, but then i plugged a mic jack plug in wrong hole and
all it does is make a fairly loud buzz now.All fuses are ok.
Does anyone have any idea what it could be and if i could repair it
myself, I have fairly limited electronic experience but can solder ok, pcd
looks pretty basic if it was just a case of soldering a new cap or
whatever
hope one of you bright people out there can help

cheers
Dave