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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
with no picture and lit LEDs on the
SS & SC boards when it is
plugged into the AC
line?
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
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