What's Wrong with my Guitar Amp? (Buzzing Noise)?

Buzzing of this sort is a classic sign of a bad connection or poor ground. Usually it's a bad cable. Since both your cables are doing it, you may have a worn jack....or two bad cables. As far as troubleshooting goes, take the OD unit out of the loop. All it's doing is magnifying the buzz. It's also normal for a cable to buzz if a guitar isn't plugged into it...so that doesn't tell us anything.

Start with the guitar connected directly to the amp: Guitar > cable > amp. Does it buzz? Does the buzz go away when you position the cable just right? If so, reverse ends of the cable and see if it still happens. If for instance, the cable buzz goes away when you wiggle the guitar end.....then stops when you reverse the plugs, you know it's the cable. If wiggling the cable has the same effect no matter which end you use, it's the jack. You didn't mention which end you are wiggling. If it's the amp end, you probably have a worn out input jack. If it's at the guitar end, it's the output jack. If your amp has more than one input, try the other one and see if it behaves the same.

However you chose to diagnose the problem, the key is to take all extra components out of the chain. Then one-by-one test each component: guitar, cable and amp.

Every electric guitar player should learn how to solder. Most bad cables can be saved by clipping off the ends and soldering new ones on. The output jack of your guitar is also an easy replacement...just two wires to solder and the part is cheap. Repairs to the amp can be a little trickier because the input jack is harder to access and probably soldered to a circuit board.

Buzzing can be annoying, but it usually has a simple cause. You just have to troubleshoot using logic and eliminate the possibilities. Good luck.

Tomy Mc.. Thanks for the detailed answer. I do have same problem with amplifier. When I connect it/plug in to the electric socket, immediately it starts loud noise. When I connect it to guitar, it doesn't give guitar sounds.. Do you have any suggestion.. ? I will try to check the options you have mentioned in your reply to the other post.

Thanks agaian..!!