Samsung UA42EH5000R Service Manual page 44

4. Troubleshooting
No video (HDMI1, 2 - Digital signal)
„
Symptom
Audio is normal but no picture is displayed on the screen.
• Check the HDMI source
Major • Check the X9N
checkpoints
• This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Diagnostics
CN502(Pin #1&3,4&6,7&9,12&10)(HDMI1)
3
Caution Make sure to disconnect the power before working on the IP Board.
4-8
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the Self Diagnosis (Support ⇢
Self Diagnosis ⇢ Picture Test) Dose the
promblem still exist self diagnosis?
Yes
Check the HDMI source and check the
connection of HDMI cable ?
Yes
Does the signal appear at ?
CN501_H2(Pin #1&3 ,4&6, 7&9, 12&10)
(HDMI2) (HDMI RX_Clk, RX_Data)
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No Check a set in the 'Stand-by mode'.
Check external devices and
No
connections.
No Input the HDMI signal properly.
Check CN502, CN501_H2 and
No Check HDMI cable.
Change the Main Ass'y.
No Please, Contact Tech support.