Samsung LN32A550P3R Service Manual page 39

4-1-7. No Video (Component 1, 2)
Symptom Audio is normal but no picture is displayed on the screen.
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Check the Component source
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Major
Check the MT8226
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
0
6
7
Caution Make sure to disconnect the power before working on the SMPS / IP Board.
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check component source and
check the connection of
component cable ?
Yes
Does the signal appear at C3028,
C3030, C3027, C3064_NT, C3066_NT,
C3063_NT?
Yes
Does the digital data appear at
output of RA5070~RA5075?
Yes
Does the digital data appear at output
of RA6074~RA6076, RA6078~RA6080,
R6082_P, R6083_P, R6086_P,
R6087_P?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input a component signal.
No
Check the connected cable.
No
Check JA3013_NT, JA3016_NT
Change the main PCB ass'y
Check IC5004
No
Change the main PCB assembly
No
Check IC6001_FBE
Change the main PCB assembly
No
Please, Contact Tech support
4. Troubleshooting
4-13