Samsung LN32A550P3R, Service Manual

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4-5
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source
Check the MT8226
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check JA3001, JA3003, CN3003_NSIDE,
HDMI cable.Change the HDMI cable.
Change the main PCB assembly
No
Yes
Does the digital data appear
at output of R5094~R5101, R5163,
R5164, D5003, D5004, D5006?
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the HDMI source and check
the connection of HDMI cable?
No
Input an HDMI signal.
Check the connected cable.
Yes
Check IC3012
Change the main PCB assembly
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the signal appear at
R3220~R3227, R3346~R3453,
R3321~R3328?
Does the digital data appear at output
of RA5070~RA5075?
No
Check IC5004
Change the main PCB assembly
4
5
6
Yes
Does the digital data appear at
output of RA6074~RA6076,
RA6078~RA6080, R6082_P,
R6083_P, R6086_P, R6087_P?
No
Check IC6001_FBE
Change the main PCB assembly
7
Caution Make sure to disconnect the power before working on the SMPS / IP Board.