Troubleshooting (No Power/Dead Unit) Part 1
Do the AC relays
click after the TV is plugged
into the AC line?
Is there
2.5V at pin 20 of connector
D5 when the power button is
pressed?
Is there 3.2V at
pin 11 of connector P25 when the power
button is pressed?
Does
pin 5 of connector
A1 momentarily go from
4.5V to 0V when the
power button is
pressed?
Is there 5V at
pin 5 of connector A7 when the
TV is plugged into
the AC line?
Unplug the TV.
Disconnect connector A7.
Does the TV turn on by itself
when it is plugged into the AC
line with no picture and lit
LEDs on SS & SC
boards?
Check connections
and the S & K boards.
Replace
The A board
Replace
The D board
Replace
The P board
Replace
The P board
Replace
The A board
Go to the
Next slide
Yes
Yes
Yes
Yes
Yes
Yes
NO
NO
NO
NO
NO
NO
Unplug the TV. Is there
continuity between pins 8 and
10 of connector P12 of the P
board?
Yes
NO
Check for missing jumper on CN SS34 on the
SS board. If jumper on connector SS34 is
present, replace the SS board.
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