Toshiba 26AV52R - Page 6

Does
the back light
function and then
turn off or is there a
dark horizontal area
on the
screen?
YESNO
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.
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.
Is 4.5VDC
present at pin 16
of P802 shortly (.5 sec)
after the unit is
turned on?
Replace the
display. ***
Remove
AC, then unplug the
LVDS cable(s). Does 24 volts
return when AC is reapplied
and the unit
is turned on?
YES
NO
SMART2009-LCD509-V4 Page 6 of 11