Troubleshooting; Previous Check - Samsung PA43H4100AR Service Manual

4. Troubleshooting

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.
3) How to distinguish if the problem is caused by Main board or Logic Board.
• No Video
If the problem is No Video but Logic Board is on and Indication LED is blinking repeatedly and faster than nomal
booting, replace the Main/Logic board.
• Distorted Picture : Check the Logic test patterns.
Logic test pattern
OK
NG
H/W Logic test pattern
• How to check Logic test pattern?
a) Entering Factory mode.
b) Move to SVC menu.
c) Move to Test Pattern.
d) Move to Test Pattern.
4-1
Picture
NG Main board.
NG Module (Panel / Logic) or Main board.
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