TroubleshootingSelf-Test Feature CheckNoteCheck the following items yourself before calling for assistance. Contact a Service Center for problemsthat you cannot solve by yourself.Self-Test Feature Check1. Turn off both your computer and the LCD Display.2. Unplug the video cable from the back of the computer.3. Turn on the LCD Display.The figure shown below ("Check Signal Cable") appears on a black background when the LCDDisplay is working normally even though no video signal is detected: While in the Self-Test mode,the LED power indicator remains green and the figure moves around on the screen.4. Turn off your LCD Display and reconnect the video cable; then turn on both your computer andthe LCD DisplayIf your LCD Display screen remains blank after using the previous procedure, check your video con-troller and computer system; your LCD Display is functioning properly.Warning MessagesYou can even view the screen at a resolution of 1360 x 768. However, you will receive the followingmessage for a minute; You can choose to change the screen resolution or stay in the current modeduring that time. And if the resolution is more than 85Hz, you will see the black screen because theLCD Display does not support over 85Hz.NoteRefer to Specifications > Preset Timing Modes for the resolutions or frequencies supported by theLCD Display.Maintenance and Cleaning1) Maintaining the LCD Display Case.Clean with a soft cloth after disconnecting the power cord.