Samsung LN52B550K1F - No Video (Analog PC signal)

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.
-
-
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Diagnostics
No
Check CN903, PC cable.
Change the Main Assy
550 32” : BN94-02518A
550 37” : BN94-02518B
550 40” : BN94-02518A
550 46” : BN94-02518D
550 52” : BN94-02518E
540 40” : BN94-02510A
540 46” : BN94-02510B
540 52” : BN94-02510C
No
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Power indicator LED is off.
Lamp(Backlight) on, no video
No
Check the PC source and
check the connection of D-SUB
Does the signal appear at
TP - PCR, PCG, PCB, PCH, PCV
(R, G, B, H, V) of IC201?
No
No
Please, Contact Tech support.
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Check IC201 (Saturn4)
Change the Main Assy
550 32” : BN94-02518A
550 37” : BN94-02518B
550 40” : BN94-02518A
550 46” : BN94-02518D
550 52” : BN94-02518E
540 40” : BN94-02510A
540 46” : BN94-02510B
540 52” : BN94-02510C
Yes
Yes
Yes
Input the analog
PC signal properly.
Yes
1
2
Check a set
in the ‘Stand-by mode’ or
‘DPMS mode’
Caution Make sure to disconnect the power before working on the IP board.