ViewSonic CDP5537-L CDP4237-L, CDP4737-L, CDP5537-L User Guide - Page 60
Troubleshooting
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TROUBLESHOOTING No image is displayed Problem Is the product power cord connected? Resolution y See if the power cord is properly connected to the outlet. Is the power indicator light on? Power is on, power indicator is blue but the screen appears extremely dark. The power indicator amber? Does the 'Out of range' message appear? Does the 'Check signal cable' message appear? y See if the power switch is turned on. y May need service. y Adjust brightness and contrast again. y Backlight may need repair. y If the product is in power saving mode, move the mouse or press any key. y Turn both devices off and then back on. y The signal from the PC (video card) is out of the vertical or horizontal frequency range of the product. Adjust the frequency range by referring to the Specifications in this manual. * Maximum resolution RGB, HDMI, DVI-D, Display Port : 1920 x 1080 @ 60 Hz y The signal cable between PC and product is not connected. Check the signal cable. y Press the 'INPUT' menu in the remote Control to check the input signal. 'Unknown Product' message appears when the product is connected. Problem Did you install the driver? Resolution y Install the product driver, which is provided with the product, or download it from the web site. (http://www.ViewSonic.com) y See if the plug&play function is supported by referring to the video card user manual. 56