I have a Fender Squire P-Bass with a Fender Rumble 15 Amp and I have the power cable connected, the power is on, nothing is in any of the inputs except the bass line input and the bass is connected with the volume turned up, yet i don't hear anything when i start to play, I'm just starting out so any help would be appreciated. Either post it on here or email me, either is fine.
make sure gain is not on 0, and any other knobs on the amp aswell. if the lead has been under any stress that could be the problem, they break pretty easily. If neither of these is the problem either your amp or your bass is busted.