Toshiba 26AV502U Service Manual page 13

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