Anti-theft Kensington LockA Kensington Lock is a physical device that can be used to protect the TV against theft. Look for theKensington slot on the back of the TV. The slot has a K icon next to it. Wrap the lock around an objectthat is too heavy to carry and then thread it through the TV's Kensington slot. The lock, however, hasto be purchased separately.The method of using a Kensington Lock may differ for each TV model. Refer to the Kensington Lockmanual for more information.Display ResolutionYou can also select one of the standard resolutions listed in the Resolution column. The TV willautomatically adjust to the resolution you choose.LED 5300 series and above, PDP 5500 seriesAfter connecting a computer to the TV, set the screen resolution for the TV on the computer. Theoptimal resolution is 1920 x 1080 @ 60 Hz. If it is set to any other than in the table below, the TV maydisplay nothing. Set the resolution properly, referring to the user guide of the computer or its graphiccard.IBMResolution StandardfrequencyHorizontalFrequency(KHz)VerticalFrequenzcy(Hz)Pixel ClockFrequency(MHz)Sync Polarity(H / V)720x400 70Hz 31.469 70.087 28.322 -/+MACResolution StandardfrequencyHorizontalFrequency(KHz)VerticalFrequenzcy(Hz)Pixel ClockFrequency(MHz)Sync Polarity(H / V)640x480 67Hz 35.000 66.667 30.240 -/-832x624 75Hz 49.726 74.551 57.284 -/-1152x870 75Hz 68.681 75.062 100.000 -/-