Does the back light
function and then turn
off?
YES
NO
If
it is available, change the
CCF inverter . If this does
not help, replace the LCD
display.
***
Is
24 VDC present
at pins 1 through 5 of
P804 when the unit is
turned
on?
YES
NO
Suspect the
Power supply.
Is
12VDC present at pin
13 of CN90 when the
unit is turned on?
NO
YES
Replace the
Low B PCB.
Is
3.3 VDC present at
pin 21 of P811B shortly
after the unit is
turned
on?
YES
Replace the
Tuner-AV
PCB.
NO
*** Warranty
Concession
required for LCD
panel replacement.
Digital photo may
be requested.
Contact Technical
Support.
Improper
backlight
operation
12