Samsung LN32A550P3R Service Manual page 31

4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
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Check the HDMI 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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4
Diagnostics
5
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 the HDMI source and check
the connection of HDMI cable?
Yes
Does the signal appear at
R3220~R3227, R3346~R3453,
R3321~R3328?
Yes
Does the digital data appear
at output of R5094~R5101, R5163,
R5164, D5003, D5004, D5006?
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 an HDMI signal.
No
Check the connected cable.
Check JA3001, JA3003, CN3003_NSIDE,
No
HDMI cable.Change the HDMI cable.
Change the main PCB assembly
Check IC3012
No
Change the main PCB assembly
No
Check IC5004
Change the main PCB assembly
Check IC6001_FBE
No
Change the main PCB assembly
No
Please, Contact Tech support
4. Troubleshooting
4-5