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 CN804, PC cable.
Change the Main Assy
32” : BN94-02746A
37” : BN94-02746B
40” : BN94-02746C
46” : BN94-02746D
No
Yes
Does the digital data appear at
Pin #19,20,34,35 (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
Input the analog
PC signal properly.
Yes
Check IC201 (Saturn4)
Change the Main Assy
32” : BN94-02746A
37” : BN94-02746B
40” : BN94-02746C
46” : BN94-02746D
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 - 821, 823, 825, 826, 828
(R, G, B, H, V) of IC201?
1
2
No
Check a set
in the ‘Stand-by mode’ or
‘DPMS mode’
Caution
Make sure to disconnect the power before working on the IP board.
