Panasonic PT-40LC12 Service Manual page 27

Note:
Before performing the troubleshooting, confirm that all connector cables in the unit are connected to
connectors correctly.
LAMP does not light up
Power LED flashes orange twice every 5 seconds.
Power LED flashes orange 3 times every 5 seconds.
Power LED flashes green continuously.
Power LED does not flashes or does not light up.
Power LED light up red.
flashes green for
140 seconds.
flashing red for light up red.
60 seconds.
Tighten screws of the Lamp Cover Unit. Still NG, replace
the Lamp Cover SW (SW2921) on Lamp Cover Switch C.B.A.
Replace the Duct FAN or TV Main C.B.A.
Is the Duct FAN turning?
YES
Short-check of
Temperature fuse (P1701).
OK
Replace LCD Power
C.B.A.
Replace TV Main C.B.A.
Is there a slight cracking
sound from LAMP when
the voltage is generated
for LAMP?
YES
Replace the LAMP.
Still NG, replace LCD
Power C.B.A.
NO
Replace TV Main C.B.A.
Replace P1701 connector
NG
cable with Temperature
fuse.
Replace the Projection
NO
Unit. Still NG, replace LCD
Power C.B.A.