Troubleshooting; Previous Check - Samsung UN55F9000AF Service Manual

4. Troubleshooting

4-1. Troubleshooting

4-1-1. Previous Check

1. Check the various cable connections first.
- Check to see if there is a burnt or damaged cable.
- Check to see if there is a disconnected or loose cable connection.
- Check to see if the cables are connected according to the connection diagram.
2. Check the power input to the Main Board.
ASSY BOARD P-JOG FUNCTION
ASSY BOARD P-RF-MODULE
3. Determining if the failure resulted from the
Nothing on screen
-
blinking, please first check the connection of the LVDS cable. If problem persists, please replace in the following
order: (1) FRC Board (2) T-CON Board (3) Main Board
Screen distortion
-
• For All mode
pattern sel FRC Pre
OK
NG
NG
NG
NG
NG
• HDMI Mode (Additional Inspection)
HDMI
OK
NG
FFC (5EA)
ASSY PCB MAIN
NETWORK
Main Board, FRC Board, or T-CON Board
: If the 'Backlight' is on but nothing appears on screen and the LED signal in front of the TV is
: Go under 'SVC' in the Service Mode and check the internal pattern.
FRC POST NT72314 OSD Pre
OK OK
OK OK
NG OK
NG NG
NG NG
NG NG
Picture
NG HDMI Input Source, HDMI Cable, or HDMI Jack
NG HDMI Switch Failure. Check starting with the pattern for Echo-P
ASSY MISC P-AQUILA_UD6
ASSY PCB MISC-FRC
ASSY T CON P
ASSY SPEAKER P (R/L)
NT72314 OSD
Post
OK
OK
OK
OK
OK
OK
OK OK
NG OK
NG NG
Problem
4. Troubleshooting
DC VSS-LED PD BD
Problem
Main Board or Signal Input Source
Main Board
Main Board, LVDS, or FRC
Main Board, LVDS, or FRC
Main Board, LVDS, or FRC
Main Board, LVDS, or FRC
T-CON, or Panel
4-1