Problem with my BE100... the BE and HBE channel do not sound

[Rusted7cl]

the clean channel sound normal... but when i flip the switch to change the channel i have no sound.

I think is a preamp tube, but i want to be shure.


thank you for any suggestion

 

[RACKSYSTEMS]

Could be the 2nd pre or 3rd from the input.

 

[Rusted7cl]

thank you