metro 12000 Lower input with hum and noise

[Goonies]

Hi folks!

today i tried the one wire mod with my metro 12000 100W. Adds a lot gain, then i decided to undo this mod to default. After connect the wires again, only the lower input (bright channel) does not work anymore, lots humm and noise, but no guitar sound. I don´t know if the lower input was bad on one wire mod, i just realise after return to default specs.

The upper inputs are fine, no hum, no noise.

Could be the jack?


http://postimg.org/image/e7gl9a58b/

[Goonies]

it was the jack or bad solder to .22 ch1

changed boths bright channel jacks, new 1M resistors, and one new solder on .022 ch1 i dont know, but everything its fine. sorry for the post.

new again.