Hitachi P42A01 Service Manual page 29

POWER DOES NOT TUNER ON
Is F500 broken?
No
Is there voltage at pin
3 of CP3802 5V?
Yes
Is there voltage at pin
3 of IC3800 AT3.3V?
Yes
Change SCALER PCB.
TROUBLESHOOTING GUIDE
Yes
No
No
E-1
Change F500.
Check CP3802 and
peripheral circuit.
Or change PSU.(Power
Suply Unit)
Check IC3800 and peripheral
circuit.
Or change AV PCB.