Samsung 320MXn quick start Problems related to the Screen, Q Check Signal Cable message

Contents LCD MONITOR quick start guide320MX 320MXn Unpacking Package ContentsIntroduction ManualsYour LCD Display Front Sold separatelyMENU button MENU Remote Control Sensor RearAdjust buttons Left-Right buttons / Volume buttons Navigate buttons Up-Down buttonsPOWER S/W ON / OFF O DC POWER OUT Power Using the Anti-Theft Kensington Lock Remote ControlCOLOR BUTTONS TTX/MIX STILL AUTO S.MODE MDC LOCK SOURCE ENTER/PRE-CH 1. POWER 2. Off 3. Number ButtonsPOWER OFF Number Buttons DEL button + VOL MUTE TV/DTV MENU INFO CH/P D.MENU GUIDE RETURN Up-Down Left-Right buttons EXIT SRS→ Movie → Speech → Custom → Custom PC / DVI / MagicInfo M/B MagicBrightConnecting a Computer Using a Power cord with EarthConnections Connecting to Other devices Connecting AV DevicesConnecting to a Camcorder Connecting Using a HDMI CableConnecting Using a DVI to HDMI Cable Connecting to an Audio SystemConnecting a LAN Cable Connecting a USB device Maintenance and Cleaning TroubleshootingSelf-Test Feature Check Warning MessagesSymptoms and Recommended Actions Problems related to the Installation PC ModeCheck List Problems related to the Screen Q Check Signal Cable messageQ Not Optimum Mode message Problems related to Audio Problems related to the Remote ControlProblems related to MagicInfo Q & ASet the resolution at the Control Panel → Display → Screen Saver Q How can I clean the outer case/LCD Panel?Q How can I play the video?