MANI
BOARD
FAULT
JUDGMENT
7
DisplA
y
（
exceptional screen
）
Exceptional screen
Check if the cable is correct
and connected tightly
Y
N
Check if the LCD
panel is OK
p
Y
N
Change the cable
for panel
Change LCD
so
e of U12
Update
2
.
3
.
Display T
T
r
r
ouble
ouble
（
white screen
）
White screen
Ch
k if h CN25
i 1 2
3
hec
the
pin
、
2
、
3 power
supply is normal?
Y
N
Check the power supply
Check if th
th
e
e
Voltage is wrong to
panal
N
Y
The panel is damaged
Check U12/ 7050 or
update software
circuit
