Sharp LC-70LE550U Operation Manual - Page 28

Appendix Problem • No picture Possible Solution • Is connection to other components correct? Page 12 • Is the correct input selected? Page 16 • Is "On" selected in "Audio Only"? Page 25 • If the PC image is not displayed, check the following: - When connecting a laptop PC to the TV, check that display output mode of the PC is set to external monitor. - Check the resolution setting on the PC. Is a non-compatible signal being input? "PC Compatibility Chart" below • Picture quality of HD programs is poor. • To enjoy HD images from external equipment, you are required to set up HDMI connection or component connection. • If the program content is not of HD quality, HD images cannot be displayed. Check that the program you are viewing provides HD images. • The HD cable/satellite set-top box may need to be configured to output HD images via cable/satellite. • The cable/satellite broadcast may not support a signal resolution of 1080p. • The TV sometimes makes a cracking sound. • This is not a malfunction. This happens when the cabinet slightly expands and contracts according to change in temperature. This does not affect the TV's performance. Troubleshooting - Error Message The example of an error message displayed on a screen Possible Solution • Failed to receive broadcast. • Check the antenna cable. Check that the antenna is correctly setup. PC Compatibility Chart It is necessary to set the PC correctly to display XGA and WXGA signal. PC Resolution Horizontal Frequency Vertical Frequency 720 x 400 31.5 kHz 70 Hz VGA 640 x 480 31.5 kHz 37.9 kHz 60 Hz 72 Hz 37.5 kHz 75 Hz 35.1 kHz 56 Hz SVGA 800 x 600 PC 37.9 kHz 48.1 kHz 46.9 kHz 60 Hz 72 Hz 75 Hz 48.4 kHz 60 Hz XGA 1024 x 768 56.5 kHz 70 Hz 60.0 kHz 75 Hz WXGA 1360 x 768 47.7 kHz 60 Hz SXGA 1280 x 1024 64.0 kHz 60 Hz 1080p 1920 x 1080 67.5 kHz 60 Hz VGA and XGA are registered trademarks of International Business Machines Corp. VESA Standard O O O O O O O O O O O O CLEARING THE SECRET NUMBER If you forget the secret number, clear the secret number using the following procedure. 1 Select "Parental CTRL" on the Setup menu to display the secret number screen. (For operating the on- screen display menu, see page 18.) 2 Press and hold both CHU and VOLk on the TV simultaneously until the message appears on the screen. The secret number is . • As a precautionary measure, make a note of your secret number above, and keep it in a safe place. 28 6@&JOEC