Service manual

Page 30
MODEL: L423FR
(2)in case of POWER-LED is lighting
NO
YES
Confirms voltage of Pin2 of
J9E00 (INV_SW) and Pin3 of
J9E00 (BRIGHT) outputs “H”
level(about more than 2V).
NO
NO
Poor harness connection.
YES
Is the following harness connected?
-Between PWB-POWER and
INVERTER (J9X00-INVERTER)
(J9W00-INVERTER)
IC300 and peripheral circuits
are out of order.(PWB-MAIN)
YES
Is the back-light on?
Inverter or back-light of LCD-
panel are out of order.
Skip to “2. No picture
displayed and picture
errors.”