Haier L19A11W, Service Manual

Page: 26 / 44

White screen
Check output of U5
Check circuit between
pin7 of U6 and grid of
Q24,or I/O of U6
Check voltage of
sourse of Q24
According
to power
trouble
Broken
LCD or LVDS
Check U5 and
its power or
timing
Check grid of Q24 for 0~3.3V
(5V or 12V
，
according to
panel voltage)
N
Y
Check power of panel
Check Q24
Broken Q24 or short circuit
Check CN8 and
CN9
N
N
N
N
Y
Y
Y
Y