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4. Troubleshooting
4-4. DVI/HDMI No Screen
The LED power turns on but the screen is blank when the HDMI cable is connected.
-
Symptom
Check the HDMI cable connections.
-
Check whether the LVDS cable is connected correctly to the panel.
-
Major
checkpoints
Check whether the lamp connector of the panel is connected correctly to the IP board.
-
Check the circuit related HDMI input and scaler operation.
-
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
4-8
CN1003
CN1002
Does led persists green light after
power on?
Yes
Dose proper 5V appear at pin No.
18 of CN1002 or CN1003?
Yes
Does proper signals appear at pin
No.15(SCL) ⑧ and No.16(SDA) ⑨
of CN1002 or CN1003?
Yes
Does proper clock signals appear
at pin NO.9 and NO.10 of D6005?
Yes
Does proper clock signals appear
at pin NO.11,12,23,24 of CN1404?
Yes
Check connection between main
board and panel.
Change Panel.
CN1403(HD)
CN1404(Full HD)
Main Board Front
No
No
Check HDMI cable connection
No
Change IC14001 or IC14002.
No
No
because of scaler problem
Check IP board
Change D6005
Change main board
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