Philips FL9.1 Technical Training Manual page 28

Backlight
Flashes
Turn the set On while monitoring the
HV output from the Inverter board at
each output one at a time.
Repeat for each of the five locations.
It is only necessary to place the scope
probe in the proximity of the output as
shown at the right.
If you connect directly, use a X100
probe.
The waveform will
appear as shown
to the right if the
output is working.
Is output
present at
each location?
Yes
The panel is most likely defective.
Check panel connections to make sure
they are sucure.
Page 26
No
Replace the
Inverter board.
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