Dell U2415 Manual

Troubleshooting  |  61
Product Specific Problems
Image retention 
from a static 
image left on 
the monitor for 
a long period of 
timeFaint shadow 
from the static 
image displayed 
appears on the 
screen•Use the Power Management feature to turn off the monitor 
at all times when not in use (for more information, see 
Power Management Modes).
•Alternatively, use a dynamically changing screensaver.
Specific 
SymptomsWhat You 
ExperiencePossible Solutions
Screen image is 
too smallImage is 
centered on...

62  |  Troubleshooting
Universal Serial Bus (USB) Specific Problems
Mobile High-Definition Link (MHL) Specific Problems
Specific 
SymptomsWhat You 
ExperiencePossible Solutions
USB interface is 
not workingUSB peripherals 
are not working•Check that your monitor is turned On.
•Reconnect the upstream cable to your computer.
•Reconnect the USB peripherals (downstream connector).
•Switch Off and then turn On the monitor again.
•Reboot the computer.
•Some USB devices like external portable HDD require higher...

Appendix  |  63
Appendix
WARNING:  Safety Instructions
 WARNING:  Use of controls, adjustments, or procedures other than those 
specified in this documentation may result in exposure to shock, electrical 
hazards, and/or mechanical hazards.
For information on safety instructions, see the Product Information Guide.
FCC Notices (U.S. Only) and Other Regulatory 
Information
For FCC notices and other regulatory information, see the regulatory compliance 
website located at...

64  |  Appendix
Setting Up Your Monitor
Setting the display resolution
For maximum display performance with Microsoft® Windows® operating systems, set 
the display resolution to 1920 x 1200 pixels by performing the following steps:
In Windows® 7, Windows® 8, and Windows® 8.1:
1For Windows® 8 and Windows® 8.1 only, select the Desktop tile to switch to classic 
desktop.
2Right-click on the desktop and click Screen Resolution.
3Click the Dropdown list of the Screen Resolution and select 1920 x 1200.
4Click...

Appendix  |  65
 NOTE: If you are unable to set the recommended resolution, please contact the 
manufacturer of your computer or consider purchasing a graphics adapter that will 
support the video resolution.