Hi Rytter,
type IXB skipper here too.
Everything ok with the interior lighting, she´s a good boat.
Perhaps you should change the bulb or some fuses. Call for the CE!
But seriously...
are you using any mods?
what type is your graphic card?
is the error visible only in the type9 sub?
You´re not under attack or too deep, arent you?
Please excuse my english