Dell U2723QE Monitor Simplified Service Manual - Page 18

6. Trouble Shooting Instructions Common symptoms What you experience Possible solutions Intermittent Problems Monitor • Ensure that the video cable connecting the malfunctions on monitor to the computer is connected properly & off and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode. Missing Color Picture missing color • Perform monitor self-test. • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Check for bent or broken pins in the video cable connector. Wrong Color Picture color not good • Try different Preset Modes in Color settings OSD. • Adjust R/G/B value under Custom Color in Color menu OSD. • Change the Input Color Format to RGB or YCbCr in the Color settings OSD. • Run the built-in diagnostics. Image retention from a static image left on the monitor for a long period of time Faint shadow from the static image displayed appears on the screen • Set the screen to turn off after a few minutes of screen idle time. These can be adjusted in Windows Power Options or Mac Energy Saver setting. • Alternatively, use a dynamically changing screensaver.