Does the back light
function and then turn
off?
YES
NO
Is
24 VDC present
at pins 1 through 5 of
P803 on the power PCB
when the unit is
turned on?
YES
NO
Replace the
Power supply
module.
Is 5VDC
present at pin 16
of P802 and 12 VDC
present at pins 2, 4, 6, and
8 of CN5 soon (.5 sec)
after the unit is
turned on?
YES
NO
If it is
available , try one or
both inverters. If this
does not help, replace
the LCD
display. ***
*** Warranty Authorization
required if display is
replaced in warranty – Go
to www7.toshiba.com for
instructions.
Backlight
Troubleshooting
Replace the
Main module.
12
Summary of Contents for 40RV52U
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