Sharp LC-32LB261U Service Manual page 21

32"&42"&50"LCD TV
4. No display
Yes
Check the LVDS cable
Yes
Panel Vcc = 12V?
Yes
Replace the Panel
Best Buy LC-32LB261U- LC-42LB261U- LC-50LB261U
No display (LED blue)
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＝12V,19.5V?
Yes
Replace the Panel
21
No
Replace the main board
No
Replace main board
No
Replace the power board