i have aproblem with 4008h machine it gives me this error when i start it at moorning
but after restarting it several times it goes well and it niver give me error for rest of the day .
i need advice from where i can start trubleshooting 24 v errors or watchdog errors ??
please

[QUOTE]Originally posted by hossam:
i have aproblem with 4008h machine it gives me this error when i start it at moorning
but after restarting it several times it goes well and it niver give me error for rest of the day .
i need advice from where i can start trubleshooting 24 v errors or watchdog errors ??
please [First of all you need to have schematics of your power supply and distribution systems. If you do not have them you need to get them. Many of the watchdog alarms and 24V low or 24V high arecaused by the power control board. The machine that is giving you the problem, try changing the power control board and run it for a few hours with no patient. Turn it on and off several times during that time also.

actually watchdog errors related to lp631 CPU board not for the powersupply logic board , i`m tracing the diagrams now .
and i`m going to swab the lpc631 today .