Information about amp and stereo

Hello everybody.

Hey all. Just travelled 1200 km to our cabin and was excited to launch the boat. Threw boat in water and all worked as it should.......but the stereo.
I have 2 batteries, one for motor and one for everything else. All acc work( blower, heater, etc) but no power to amp or stereo. Toggle switch lights up, but does not put on amp or stereo.
I thought the bumpy ride loosened something up, but I cannot see anything.
Now I need some expert advice, which a lot of you have..... Any help will make my day.

Check the breaker switch usually located in the observers storage compartment close to batts:Attachment 21244

if you have a dual battery switch, try with it in the combine/both/1+2 position, how ever its labeled. Dead batteries are very common. Do the other devises wired to the house battery, work? Also, if the batteries have been disconnected, look close for a stray cable that got overlooked. Beyond the simple and visual, you will need a volt meter.