What ???why are you replying to a 30 day old thread that has been solved and over here in the states if its a double cabinet the LAST thing you do is dis assemble a ksu on site and waste time scratching your head trying to figure out why a 20 year old systems power supply spit the bit you throw in your spare the reload the latest backup of the master or spare and you are done ,The idea is the less down time the happier the customer and then you work in that the customer may want to consider upgrading their system!!Then then you send the busted one off to be repaired and it has a one year or two guarantee on it and its your spare