Help! 2006 SAN. No power

[jkallen21]

First weekend out with the Fam on the new boat. Found that battery switch was left in "both" all winter. 2 dead batteries. Replaced one battery but I get no power to dash. Nothing. I don't put in the start code, hit start and get nothing. Boat is still on trailer if that makes any difference. I have checked all circuit breakers I can find including 50A on engine. I'm hoping its just something I missed. Under the steering wheel (way under) are two rows of lights(?). None are on. If they are breakers they are not popped.

Does Horn work without code?
which battery is 1 and which is 2?
if I set to "both" an only have 1 battery is that going to work?

help!
thanks

[jmo]

I would replace both batteries, and then check connections, and the kill switch (on, off, bilge only), and make sure you safety lanyard is still in place. Any of these things can result in no power to the dash. The horn will only work if the dash has power.

[jmo]

And yes, the horn works (provided there is power) without entering the start code on the keypad.

[jkallen21]

It was that bildge switch. What's that thing for (besides ruining my Sunday)?
thank you SO much.
Incidentally, my horn is broken and does not work made things worse.

[AirTool]

I don't put in the start code, ...

Can you elaborate on this statement?