While you wait for answers, we may have found some information which could help you.
Click here for Yamaha Wiring UpHow to repair a Torque T30 1EB Amplifier?
Guitar?
How do I fix my bass amp when no sounds are coming out?
High volume Hum / Buzz Fender Fm 65R ?
no power on crate g40c xl?
How can I fix my Toby bass amp vu meter?