4-1-2. 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 Saturn4(IC201). -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
Check CN804, PC cable.
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Yes
Does the digital data appear at
Pin #16,17 (LVDS Data clk)
of LVDS connector?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the PC source and
check the connection of D-SUB ?
No
Insert the analog PC signal properly.
Yes
Check IC201 (Saturn4).
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support.
No
Does the signal appear at
TP - 821, 823, 825, 826, 828
(R, G, B, H, V) of IC201?
1
2
No
Check if the set is in
‘Stand-by mode’ or *DPMS mode.’
* DPMS Mode : Display Power management Signaling mode.
- If PC is power off in TV's PC mode, TV SET will be DPMS Mode.
- It is similar TV's Stand by mode. (Turn off Backlight, Function LED is blinking)
Caution Make sure to disconnect the power before working on the IP board.
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