Luke 3 bridge pickup issue

[Dutch]

When I played my Luke 3 (SSH) today I noticed that the output of the bridge pickup is significantly lower than before.
The single coils are much louder. I did replace the battery, but no improvement.
I did adjust the mini pots a bit, but no improvement either.
Has anyone experienced this before? Any quick fixes before I make the (long) drive to the dealer?

 

[beej]

Maybe drop the customer service folks a line?

 

[Dutch]

Maybe drop the customer service folks a line?

I did send them an email, but no response yet.
Hopefully this will/can be solved before this weekend's gig....

 

[Dutch]

Customer service said they can't provide a remote diagnosis and suggest I take it to a qualified tech.
Any ideas on easy fixes?
Does the Luke 3 have a lot of (complicated) electronics on board or is it quite similar to any other electric guitar?
In case there are no ideas on easy fixes I'll take the Luke to a tech.