Repair of the ZSK board on HEIDELBERG 74 where to dig? maybe no fee?

Question

Do it yourself

I bought a HEIDELBERG 74-2 2003.
Brought, installed, everything was connected correctly.
Doesn't pass the safety test, so the machine doesn't start, the tables don't work... only the compressors turn on.
According to the test, the 14th limit switch is constantly active (upper at the acceptance).
On E, he always has +1. Can't reset.
The signal reaches the board, respectively, it is necessary to look for a problem on the board ??? ZSK board
Other security errors are reset...
Before buying everything was spinning and printing..
Please help...