Hi
You say the amp worked fine the next morning. So is it still working now? Have you just tried unplugging everything and just pluging your bass straight into the amps main input, not using any effects pedals and just plugging the amp straight into the cab? Try to remove any potential problems and keep the set up simple and check through by process of elimination. It may be something very simple. If your bass is active is the battery dead? If it is you won't get anything out at all.