There is a special board, where you can copy from a well working PMU to another (maybe defective) PMU.
It also works with ASMU (1, 2 and E) to ASMU (1, 2 and E).
I cannot remember the name of this board.
It is just to plug in to the MPB slot of the ipLDK cabinet and automatically the one PMU is copied to the other PMU.
You need to a authorized LG-Ericsson reseller to buy this board.
///doktor