When I turn on my marshall amp it makes a strange sound which resembles a small motor. it has only started making this sound recently, before now the amp was silent. the sound on the amp is good but it just makes this weird noise. can you help me?
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Firstly, do not disconnect the speakers from the amp when it is on. Damage is possible.
You have a bad ground somewhere in the hookup. The first suspect would be your guitar-to-amp cord shielding connections at each plug, then, the wiring in your guitar. Try changing each of these to another as a trial, one at a time.
I have fixed so many of these amps over the years... Marshall Valvestate series of amps are notorious for dry solder joints developing on the main PCB. If you have the skills(or an old mate that does)Remove the PCB from the chassis and resolder any suspect dry joints and you will fix the problem. Check particularly about any components there the PB has changed colour. This is an indication of heat in that area, and heating and cooling is a major cause dry joints. I am more than happy to answer
any other questions you may have about it, just give me a hoy :) If you
are still unsure, or have problems, then before you give a rating for this advice, please
get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you
as sound, a FixYa rating is a great reward for my efforts to help
When I turn on my marshall amplifier its makes this unusual, anoying sound. it sounds like a small motor or a fan going. the sound of the amp is good but its just makes this motor sound when I switch it on. can you help me find the problem.