Just because the lid lock light is flashing doesn't always mean the lid lock is at fault as you would be lead to believe by reading the manuals.
It will start flashing to basically let you know there is a fault of some kind, you have to check the error codes to find out what the actual faults are.
The shift actuator is the most common problem and it can test good with the optics test and still be the part causing the random problems.
There is a good chance the boards in the others where OK also and the actual problem was the shift actuators.
Bruther Willie speaks the truth! The shift actuator is the key to the VMW universe.