Samsung 640 series, User Manual

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English - 62
RECOMMENDATIONS
Troubleshooting
If the TV seems to have a problem, rst try this list of possible problems and solutions. If none of these troubleshooting tips apply,
call Samsung customer service at 1-800-SAMSUNG.
Problem Possible Solution
Poor picture. Try another channel. / Adjust the antenna. / Check all wire connections.
Poor sound quality. Try another channel. / Adjust the antenna.
No picture or sound. Try another channel. / Press the SOURCE button.
Make sure the TV is plugged in. / Check the antenna connections.
No sound or sound is too low at
maximum volume. First, check the volume of units connected to your TV (digital broadcasting receiver, DVD,
cable broadcasting receiver, VCR, etc.). Then, adjust the TV volume accordingly.
Picture rolls vertically. Check all wire connections.
There is a problem with the picture Run the Picture test in the Self diagnostic menu.
There is a problem with the sound Run the Sound test in the Self diagnostic menu.
The TV operates erratically. Unplug the TV for 30 seconds, then try operating it again.
The TV won’t turn on. Make sure the wall outlet is working.
Remote control malfunctions. Replace the remote control batteries.
Clean the upper edge of the remote control (transmission window).
Check the battery terminals.
‘Check signal cable’ message. Ensure that the signal cable is rmly connected to the PC source.
‘Not Supported Mode’ message. Check the maximum resolution and connected device’s Video frequency.
Compare these values with the data in the Display Modes.
Digital broadcasting screen
problem. Please check the digital signal strength and input antenna.
The image is too light or too dark. Adjust the Brightness and Contrast. / Adjust the Fine tuning.
Black bars on the screen. Make sure the broadcast you’re receiving is High Denition (HD).
HD channels sometimes broadcast Standard Denition (SD) programming, which can
cause black bars.
Set your cable/satellite box to stretch or widescreen mode to eliminate the bars.
Picture has a Red/Green or Pink
tint. Make sure the Component cables are connected to the correct jacks.
Closed Captioning not working. If you are using a Cable/Satellite box, you must set Closed Captioning on the box, not
your TV.
Snowy picture. Your cable box may need a rmware upgrade. Please contact your Cable company.
Ghosting on picture. This is sometimes caused by compatibility issues with your cable box.
Try connecting Component cables instead.
Horizontal bars appear to icker,
jitter or shimmer on the image. Adjust the Coarse tuning and then adjust the Fine tuning.
Vertical bars appear to icker, jitter
or shimmer on the image. Adjust the Coarse tuning and then adjust the Fine tuning.
Screen is black and power indicator
light blinks steadily. On your computer check: Power, Signal Cable.
The TV is using its power management system.
Move the computer's mouse or press any key on the keyboard.
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