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Appendix C: Trouble shooting
Failure phenomena Failure cause Treatment
LED lamp in IM
(intellectual LED
module)dead, dark,
and long lighting. Dead and dark Lights 50
are generally the problem of LED lamp; LED long
bright may be caused by IC empty soldering or
internal short circuit. Replace the IM
Four LEDs in a row are
dark or long bright IC short soldering or bad pin inserting Replace the module
Entire IM and the IM
next to it doesn
’
t
display or display
white
1.The IM with bad circuit
2. Bad Flat signal cable
3. Bad power supply plug on the IM 1.Replace the bad
module
2.Replaced the bad flat
signal cable
3.Replace power supply
plug
Many IMS don
’
t
display
1.No voltage output for the power supply
2.Bad branch controller 1.Replace the bad
power supply
2.Replace the branch
controller
The whole screen is
blank 1.Main control card is damaged
2. The first branch card has been damaged.
3.IPC don
’
t have DVI output
4Multifunction card has been damaged
1.Replace the main
controller card
2.Replace the branch
controller
3.Set the DVI output or
replace the bad display
card in the PC;
4.Replace bad
multi-function card
picture is not
consistent in multiple
area of the screen Wrong Panel address setting or wrong wire
connecting in the Control software Reset the Panel address
and wire connecting in
the software
exchanged displaying
for multi -IMs Exchang the connection of the first flat module of
data line Exchange date line
The screen can not
automatically control
the brightness 1.Multifunction card has been damaged;
2 Light sensors have been damaged;
3 Control software does not start the automatic
brightness control; 1.Replace the
multifunction board;
2.Replace the light
sensors;
3. Reset to automatic
brightness control in
the software.