NO DISPLAY / ON MONITOR / OR TERMINAL
B
NO
+5V / PRESENT?
YES
REPLACE POWER / SUPPLY
NO
+5V / SHORTED TO / GROUND?
REPLACE / OSCILLATOR
NO
16 / MHz CLOCK / PRESENT?
YES
YES
INSPECT MAIN / PCB FOR / SHORTED +5V
MC68030 / HALTED?
YES
NO
NO
FOUND / SHORT?
YES
REPLACE COMBO
REPLACE COMBO / OR MC68030
NO
REPLACE MAIN / PCB
REMOVE SHORT / AND RECHECK
RS-232 / DISPLAY?
YES
NO
SEE THEORY OF / OPERATION, CALL / TECH SUPPORT, / OR REPLACE MAIN / PCB
DIAGNOSTIC / ERROR?
YES
NO
C
REPLACE PARTS / PER / DIAGNOSTIC / GUIDE
