AOC LE40D1331-30 Service Manual page 22

4. No display
Yes
Check the LVDS cable
Yes
Panel Vcc = 12V?
Yes
Replace the Panel
No display (No LED)
Check TV is under control and power
on/off by remote control and power key?
Yes
Check the backlight is
"On"?
No
Reinsert or replace the
LVDS cable
No
Replace the main board
No
Check the B/L
signal is available?
Yes
Power board output＝12/16V?
Yes
Replace the Panel
22
No
Replace the main board
No
Replace main board
No
Replace the power board