Samsung PN51D490A1DXZA E-Manual page 152

● Information: (digital channels only) The reception quality of over-the-air
Signal
HD channels is either perfect or the channels are unavailable. Signal Information
displays HD channel signal strength so you can adjust your antenna to increase
signal strength and receive HD channels.
● Troubleshooting: Displays a troubleshooting guide organized into four
symptom categories: Poor or Distorted Picture, Distorted Sound or No Sound,
RF or PC Issues, and Other Issues. If your TV seems to be having a problem,
access the troubleshooting guide for a solution.
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