Hdmi No Screen - Samsung P2270HD Service Manual

4. Troubleshooting

4-5. HDMI No Screen

The LED power turns on but the screen is blank when the HDMI cable is connected.
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Symptom
Check the HDMI cable connections.
-
Check whether the LVDS cable is connected correctly to the panel.
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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.
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Does led persists green light after
Diagnostics
Dose proper 5V appear at pin No.
Does proper signals appear at pin
and No.16(SDA) ⑨ of CN6009?
Does proper clock signals appear
at pin NO.9 and NO.10 of D6005?
Does proper clock signals appear
at pin NO.11,12,23,24 of CN1005?
Check connection between main
Caution Make sure to disconnect the power before working on the IP board.
4-10
All manuals and user guides at all-guides.com
CN6009
Main Board Front
power on?
Yes
18 of CN6009?
Yes
No.15(SCL) ⑧
Yes
Yes
Yes
board and panel.
Change Panel.
CN1005
No
Check IP board
No
Check HDMI cable connection
No
Change IC6002
No
Change D6005
Change main board
No
because of scaler problem