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3. Protection or without light (refers to the disappearance of image several seconds
after the emergence of image)
NO
No problems identified, replace high-voltage
board; if the fault remains, check the contact
line of back light of LCD for any damage, and
replace LCD board.
4. White panel
YES
Check the interface between main board
and connect line for any looseness,
shedding,
if
no
replace LCD screen
The
image
disappeared
emergence; check the plug of high-voltage switch board
for striking sparks and poor contact
White panel refers to the back light works
without visible signal and just show white
screen. Check the voltage of socket for flat
cable connecting the main board to screen
for abnormality
abnormity
existed,
29
immediately
after
If there is spark striking,
replace high-voltage board
NO
Check the power supply chip of
control screen or replace main
board
the
YES
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