HP LC3260N - Troubleshooting Guide; Troubleshooting Power Issues

TROUBLESHOOTING GUIDE
E-1
POWER DOES NOT TURN ON
NO
IS F501 BROKEN ?
YES
CHANGE F501.
NO
YES
CHECK IC503 AND
PERIPHERAL CIRCUIT.
NO
CHECK IC3804 AND
PERIPHERAL CIRCUIT.
OR CHANGE AV PCB.
NO
YES
CHECK IC506 AND
PERIPHERAL CIRCUIT.
OR CHANGE POWER PCB.
YES
CHANGE SCALER PCB.
IS THERE VOLTAGE
AT PIN 2 OF IC3804
AT3.3V ?
IS THERE VOLTAGE
AT PIN 4 OF IC506
AT5V ?
IS THERE VOLTAGE
AT PIN 4 OF IC503
20.5V ?