Code 5644: “lamp power supplies - lampis on, but at least one lamp power supply is off” (Error)

Situation	Solution
Main power cable disconnected from the LPS unit.	Check if the main power cable is connected with the “MAINSINPUT” socket of the LPS unit.
Disconnected wire unit between the “CTRL IN” andthe LPS interface board.	Reconnect the wire unit between the “CTRL IN”and the LPS interface board.
Malfunction LPS communication interface. One or both LPS unitssuddenly stops operating. In most cases this happens after the projectoris warmed up. Older LPS communication interfaces may have this problemin combination with some LPS units.	Check the revision of the LPS communication interface (reference1 ) The module revision mustbe “10” or higher. In case the module revision is lowerthan “10” replace the LPS communication interface. See service manual chapter Replacement of the LPS communication interface.
Malfunction LPS units. The red LED “ERR” of themalfunction LPS unit flashes fast.	Replace the whole LPS module.