Dell D2015HC Dell Monitor Users Guide - Page 16

TECHNICAL SUPPORT (FAQ) Problem & Question Power LED is not on No Plug & Play Picture is fuzzy Picture bounces or a wave pattern is present in the picture The power LED is ON (orange) but there is no video or no picture. Missing one of the primary colors (RED, GREEN, or BLUE) Screen image is not centered or sized properly. Picture has color defects (white does not look white) Poor brightness or contrast Horizontal or vertical disturbances on the screen Possible Solution • Check if the Power Switch is in the ON position. • Power Cord should be connected. • Check if the PC system is Plug & Play compatible. • Check if the Video Card is Plug & Play compatible. • Check if the D-15 plug pin of Video Cable is bent. • Adjust the Contrast and Brightness Controls. • Move electrical devices that may cause electrical interference. • Computer Power Switch should be in the ON position. • Computer Video Card should be snugly seated in its slot. • Make sure monitor's video cable is properly connected to the computer. • Inspect monitor's video cable and make sure none of the pins are bent. • Make sure computer is operational by pressing the CAPS LOCK key on the keyboard while observing the CAPS LOCK LED. The LED should either turn ON or OFF after pressing the CAPS LOCK key. • Inspect the monitor's video cable and make sure that none of the pins are bent. • Adjust pixel frequency (CLOCK) and PHASE or press hot-key (AUTO). • Adjust RGB color or select color temperature. • When the brightness of the screen lowers after being used for a certain period and the function of the display is affected, send it to our authorized service center for repair. • Adjust CLOCK and PHASE or perform hot- key (AUTO-key). CLOCK (pixel frequency) controls the number of pixels scanned by one horizontal sweep. If the frequency is not correct, the screen shows vertical stripes and the picture does not have correct width. PHASE adjusts the phase of the pixel clock signal.With a wrong phase adjustment the picture has horizontal disturbances in light picture. For PHASE and CLOCK adjustment best to use "dot-pattern". 16