If surveillance is enabled, the Service Processor provides a 'processor-well' checking function for the node. If a processor fails to perform for a length of time, it is assumed by the Service Processor to be hung. The Service Processor posts an LCD code of 40B0010p, where p is the processor number of the hung processor. If this condition occurs, call IBM hardware service, or consult the hardware manual for a procedure to collect pertinent data from the Service Processor.