Here is some information from Dell that will help. The links below will help you...
You may run a diagnostic test on system hardware to ensure correct functionality of system hardware by following the steps below:
• Restart your computer and tap F12 at Dell logo.
• Highlight 'Diagnostics' and hit Enter.
• Make a note of error code if any.
If the test fails and generates any error code, it might be issue with system hardware and might need replacement. If the diagnostics pass, you may perform a clean boot to remove the unwanted programs and services from start up. For more information on this, you can refer to link: http://bit.ly/Vi0QXe
Here is a phone number for parts 1-877-717-3355
Dell Hot Topics: http://dell.to/OetxRZ
Drivers Download: http://dell.to/O9AJwH
Windows 8 Upgrade Info: http://dell.to/PMMtab
Parts and Upgrades: http://dell.to/OcszSR Phone 1-877-717-3355
Dell Hardware Diagnostics: http://dell.to/SwCVmt
http://bit.ly/14kVsYR
CompTIA A+ Certified Computer Professional