How To Check Fault Symptom; No Video (Hdmi 1, 2, 3 - Digital Signal) - Samsung UA32F45 Series Service Manual

4-2. How to Check Fault Symptom

No Video (HDMI 1, 2, 3 - Digital Signal)

„
*Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.
• Audio is normal but no picture is displayed on the screen.
Symptom
• Check the HDMI source.
Major • Check the HDMI switch.
checkpoints
• This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
1
Diagnostics
2
Caution
Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the HDMI source and
check the connection of HDMI cable ?
Yes
Check the signal at Input of Main board ?
HDMI1 Clk : Pin #10, #12 of CN602_H2
DATA : Pin #7, #9, #4, #6, #1, #3 of
CN602_H2
HDMI2 Clk : Pin #10, #12 of CN603_H3
DATA : Pin #7, #9, #4, #6, #1, #3 of
CN603_H3
HDMI3 Clk : Pin #10, #12 of CN604_H4
DATA : Pin #7, #9, #4, #6, #1, #3 of
CN604_H4
HDMI4 Clk : Pin #10, #12 of CN601_H1
DATA : Pin #7, #9, #4, #6, #1, #3 of
CN601_H1
Yes
Check the LVDS clk signal at output of
Main board.(TX)
TX2_CLK : ODD_TXCLK_DN/DP
TX4_CLK : EVEN_TXCLK_DN/DP
Yes
Check the LVDS cable?
Replace the T-con / LCD panel?
No Check a set in the 'Stand-by mode'.
No Input the HDMI signal properly.
Check CN601~4.
Check HDMI cable.
Change the Main Ass'y
No
Check IC1001(X12).
Change the Main Ass'y.
Check IC1001(X12).
No
Change the Main Ass'y.
No Please, Contact Tech support.
4. Troubleshooting
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4-3