Daewoo L520B Service Manual page 34

3. No Raster
Replace a LCD panal.
No Raster
Yes
Check the
output of Q4 or
pin 41 of U6.
> 2.5
Is 12V
plugged in pin 1
of CN4A(power
board)?
Yes
Is the output of
inverter correct?
Yes
Trouble in Q5 or
pin 41 of
< 2.5
No
Check the output
of D811(power board).
No
Replace the inverter.
32
-com.