No Power Flowchart - Panasonic TC-P42X1 Revised Troubleshooting Handbook

Trouble Mode Defective Board (Possibilities)
Dead/No power
Unplug the TV and remove connectors P6 and P25
on the P board and C11 on the C1 board. Connect
the TV and press the power switch.
No
Do the relays click?
Is there 3.2V
Yes
at pin 6 of connector P7 on
the P board when the power
button is
pressed?
Replace
The P board
If connections between
A6 and P7 are OK,
replace the P board

No Power Flowchart

P, A, C1, K, S
No
Unplug the TV and
reconnect P6 and P25
Yes
only. Plug in the TV and
press the power switch
No
Replace
Do the relays click?
The A board
No
Unplug the TV
and remove the
metal plate
covering the A
board.
Reconnect the TV
Yes
No Is there 5V
at pin 13 of connector
A6 at plug in?
Start Here
Do the AC relays
click after pressing the
power switch?
Replace
The P board
Unplug the TV and reconnect
Yes
C11. Disconnect C14 on the
C1 board and plug in the TV.
Press the power switch
Yes
Replace turning on with only
The GK board half of the screen
Yes
when the TV's power switch
Replace
The A board
Yes
Place your voltmeter on pin
11 of connector P25 and
press the power switch
Yes
Is there 3.2V present?
If connections between
P25 and A25 are OK,
It the TV
No
working?
Does the
voltage at pin 8 of A1
changes from 4.7V to 0V
is pressed?
No
replace the A board
If connections
between A31
and C11 are OK,
replace the
C1 board
If connections
No
between A1
and K1 are OK,
replace the
K and S boards
Slide #64