LCD-71114KL Service inspection Manual Page 4 of 5
(4) Faulted Function:
Not Picture on screen and audio Sound is Normal.
Not
Yes
Not
Not
YES
Yes
Not
Yes
Not
Yes
Check the video input
TV/AV1 is active or not.
Check the brightness & Contrast be set
normal level and the background is
bright screen.
Check the power of the
back-lighting parts or
not.
Check control buttons is
active and display OSD on
screen.
Start
May be damaged
fluorescent tube
Press TV/AV button
to select source signal
Replace new
components
Q1/Q2
or check
near
components of
circuitry.
Check U14 (Pin-13 to 15)
have R, G, B, wave output
Check the
U10
(Pin-10) and control
button key.
Check the connector CN3 and
near components of circuitry
Check IC U14 and
near components of
circuitry.
