Panasonic TC-P42X1 Revised Troubleshooting Handbook page 39

5 Blinks Error Code (All Models)
If the power LED continues to blink even after the TV is unplugged, press and hold the power
switch on the TV for a few seconds until the LED turns off.
Yes
Is there a
Replace
short to
the P board
ground?
Reconnect SC20 and disconnect SS23 (HD models)/SS33 (Full-
HD models) on the SS board. Measure the resistance between
pin 5 of connector P25 on the P board and ground (Chassis).
Yes
Is there a
short to
ground?
Go to the
next slide (A)
Use a volt-meter and place the positive probe on pin 5 of connector P25 on the P board
while the negative probe is grounded. Plug in the TV and turn it on
Yes
Replace
the A board
Disconnect P25 on the P board. Measure the
resistance between pin 5 of connector P25 on
the P board and ground (Chassis).
No
Reconnect P25 and disconnect SC20 on
the SC board. Measure the resistance
between pin 5 of connector P25 on the P
board and ground (Chassis).
No
Replace
the SS board
Start Here
Is No
there resistance between pin 5 of connector P25 on
5V?
Yes
Yes
Is there a
Replace
short to
the SC board
ground?
Disconnect the TV and measure the
the P board and ground (Chassis).
No
Yes
Is there a
short to
ground?
No
Is there a
short to
ground?
Disconnect SC46 and reconnect
SC20 on the SC board. Measure
the resistance between pin 5 of
connector P25 on the P board and
ground Chassis).
No
Replace
the SD board
Replace
the P board
Slide #39