Haier HL22KN1 Service Manual page 48

Function Trouble （PC）
Picture not
In center
Check the R.G.B
input signal for U5
Y
Do "Auto adjust" Do "Reset" process
process on the menu
PC
Missing
color
N
Do "Reset" process
Check the circuit
of R.G.B
input
cann't be support
Picture
dithering
Check if the wave
of Vsync,Hsync is ok
Y N
Check the
on the menu or
circuit of
the input mode
Vsync,Hsync
No signal
Check the circuit
of Vsync,Hsync
or there was no
signal input