Samsung LA37C630 Series, Service Manual

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4-1
4. Troubleshooting
4. Troubleshooting
4-1. Troubleshooting
Check the various cable connections first. 1.
• 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.
Check the power input to the Main Board.
2.
Self Diagnosis 3.
Picture Test •
If you think you have a picture problem, perform the picture test. Check the colour pattern on the screen to see if the problem still
exists.
Yes : If the test pattern does not appear or there is noise in the test pattern, select Yes.
There may be a problem with the TV. Therefore, contact Samsung’s call centre for assistance.
Yes : If the test pattern is properly displayed, select No. There may be a problem with your external equipment.
Please check your connections. If the problem still persists, refer to the external device’s user manual.
Sound Test •
If you think you have a sound problem, please perform the sound test. You can check the sound by playing a built-in melody
sound through the TV.
If you hear no sound from the TV’s speakers, before performing the sound test, make sure
Speaker Select is set to TV speaker
in the Sound menu.
The melody will be heard during the test even if
Speaker Select
is set to
External Speaker
or the sound is muted by pressing the
MUTE button.
Yes : If during the sound test you can hear sound only from one speaker or not at all, select Yes.
There may be a problem with the TV. Therefore, contact Samsung’s call centre for assistance.
No : If you can hear sound from the speakers, select No. There may be a problem with your external equipment.
Please check your connections. If the problem still persists, refer to the external device’s user manual.
Signal Information (digital channels only) •
Unlike analogue channels, which can vary in reception quality from ‘snowy’ to clear, digital (HDTV) channels have either perfect
reception quality or you will not receive them at all. So, unlike analogue channels, you cannot fine tune a digital channel. You can,
however, adjust your antenna to improve the reception of available digital channels.
If the signal strength meter indicates that the signal is weak, physically adjust your antenna to increase the signal strength.
Continue to adjust the antenna until you find the best position with the strongest signal.