orange ad140 the humming that wouldn't die

[whybother182]

it's been about two years since i changed my tubes....my amp started this humming when i played clean and dirty channel... i took a look at it and seemed to me that one of the el34 tubes died out while the other tubes shined bright.... so i replaced every tube in the amp with the exact brand tube it had before. it's still humming. also i found out that when i touch the guitar cable cord it stops buzzing... i tried 3 different guitar cables and 2 different guitars so i know its not the guitar or the cables . maybe i need to have my amp biased? HELP PLEASE

[Gladmarr]

You might have a grounding problem. You might want to take that to a tech.

[whybother182]

thank you for the advice i'll go check that out

[Gladmarr]

...oh yeah, I meant to also say

...because a grounding problem can get dangerous.....

Maybe before you take it to a tech, move to a different part of the building where you use this amp (or a different building altogether) to make sure it isn't just a poorly grounded outlet you've had it plugged into all this time.....