Simrad AP 24 autopilot problem

[pr2501]

Hello,

after coming back to my boat for the new season I did check also my autopilot.
And the control unit is not switching on.

There was lot of humidity on the boat.

Where can I get the manual to check voltage of 4 connecting wires

The CP unit has the green led on.

And is it possible to open the control unit to check if there is some damage of water coming in?

Thank you