4-1-2. No Video (Analog PC signal)
N Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom Audio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the PC source -
Check the Genoa-P -
This may happen when the LVDS cable connecting the Main Board and the Panel is -
disconnected.
Diagnostics
MAIN BOARD
SMPS BOARD
T-CON
Input the analog PC signal properly.
No
Yes
Check the signal appear at input of
IC901 ?
PC_RED : BD401
PC_GREEN : BD402
PC_BLUE : BD403
PC_H_SYNK : R408
PC_V_SYNK : R409
Check the LVDS clk signal at output of
Main board (TX) ?
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
No
No
Yes
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check a set in the ‘Stand-by mode’
or ‘DPMS mode’.
No
Yes
Check CN401, PC cable.
Change the Main Ass'y.
Check IC1001 (GenoaS)
and IC2001 (Parma).
Change the Main Assy.
Check the LVDS cable?
Replace the LCD panel?
Please, contact Tech support.
No
Check the PC source and check the
connection of D-SUB ?
1
2
Caution Make sure to disconnect the power before working on the IP board.
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