Samsung LE19C45 Series, Service Manual

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4-4
4. Troubleshooting
4-1-3. No Video (Analog PC signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the PC source
-
Check the Arsenal, Check the Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics Check CN902, PC cable.
Change the Main Assy.
No
Yes
Does the digital data appear at
OD(D3+),
ODD_TXCLK-(D3-)?
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video
Yes
Check the PC source and
check the connection of D-SUB
No
Input the analog
PC signal properly.
Yes
Check IC1102(SETD-10).
Change the main Assy.
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Please, Contact Tech support.
No
Does the signal appear at
TP - PC_R, PC_G, PC_B, PC_HS,
PC_VS (R, G, B, H, V)?
1
2
No
Check a set
in the ‘Stand-by mode’ or
‘DPMS mode’
No
Caution Make sure to disconnect the power before working on the IP board.