Marshall VS65R is powered up it hums
I could not find this amp on the list. When my Marshall VS65R is powered up it has an immediate hum that remains constant no matter what I do. None of the knobs or buttons changes the hum. Could this be a blown speaker or a shorted reverb unit or bad pre amp tube?
Music - Marshall - Mg50dfx 50-Watt Combo Guitar Amplifier
Answers & Comments
Blown speaker NO (would not get sound at all)
Bad Reverb UNLIKELY (controls would deselect reverb and it would be out of circuit)
Bad preamp tube NO (controls have no effect)
Bad rectifier and/or filter caps LIKELY
Bad power amp POSSIBLE