Toshiba 37AV502U Service Manual page 11

No or distorted
video
Does
NO
the back light function
normally when the unit
is turned on?
Troubleshoot for
backlight problelms.
*** Warranty Authorization required if
display is replaced in warranty – Go
to www7.toshiba.com for instructions.
YES
the screen discolored
YES
or does it have streaks
or dark areas with no
signal input?
This signal viewed from
LVDS connector
referencing cold ground.
If the LCD Control
Board is available, try
it. If this does not help,
replace the LCD
display panel. ***
Is
NO
When
the input button
is pressed on the
YES
receiver or remote, is
the on screen
display clear and
normal?
Replace
the Main
Module.
Check for LVDS activity at
CN5. If it is present suspect a
problem with the display control
board (Tcon). If it is not present
replace the main PCB.
10
Examples
NO
Using the
power distribution
YES
diagram, are the
voltages normal at P802
of the power supply
module?
NO
Suspect the
power supply
module.