THE #4 WINZE CAGE HOIST WAS DISABLED DUE TO ELECTRICAL PROBLEMS. THREE PROBLEMS WERE IDENTIFIED, DEFECTIVE CIRCUIT BOARD IN SILTROMM CONTROL, A DEFECTIVE RELAY SWITCH AND ALSO REPLACED A REFER ENCE POTIENTIOMETER. THE CAGE HOIST WAS FULLY OPERATIONAL AT 5:30 PM JUNE 16, 2000. THE SKIP HOIST WAS AVAILABLE TO HOIST PERSONNEL DURING ANY EMERGENCY WHILE REPAIRS WERE BEING MADE.