Service ManualModel No.: HL24XK220How to useTurn on the computer and the TV.AUse INPUT on the remote control to select VGA orB HDMI source.Check the image on your TV. There may be noiseC associated with the resolution, vertical pattern,contrast or brightness in VGA mode. If noiseis present, change the VGA mode to anotherresolution, change the refresh rate to another rateor adjust the brightness and contrast on the menuuntil the picture is clear. If the refresh rate of the VGAgraphic card can not be changed, change the VGAgraphic card or consult the manufacturer of the VGAgraphic card.NoteUse a DVI cable.RAvoid keeping a fixed image on the TV’s screenRfor a long period of time. The fixed image maybecome permanently imprinted on the screen.The synchronization input form for Horizontal andRVertical frequencies is separate.ResolutionYMode ResolutionFramefrequency(Hz)VGA 640s480 60HzSVGA 800s600 60Hz75HzXGA 1024s768 60Hz75HzCable TV SetupAfter subscribing to a cable TV service from a localprovider you can watch cable TV programming. The TVcannot display TV programming unless a TV tunerdevice or cable TV converter box is connected to the TV.For further information regarding cable TV service,contact your local cable TVservice provider(s).Connection Option 1Select 3 or 4 with channel switch on cable box.ATune the TV channel to the same selected outputBchannel on cable box.Select channels at the cable box or with the cableC box remote control.VIDEOAV INAUDIO OUTL RL -AUDIO- R ANT INConnection Option 2Connect the audio and video cables from the CableABox's output jacks to the TV input jacks, as shown in thefigure.When connecting the TV to a Cable Box, matchthe jack colors (Video = yellow, Audio Left = white, andAudio Right = red).Select the input source by using theB INPUT buttonon the remote control or on the TV.Select your desired channel with the remote controlCfor cable box.HDMI inputHow To ConnectConnect the cables from the external equipment'soutput jacks to the TV input jacks, as shown in the figure.How To UseSelect the input source by usingA INPUT button onthe remote control or on the TV.Operate the corresponding external equipment.BRefer to external equipment operating guide.