Hi George,
This can be an LCD issue. To confirm, run LCD diagnostics on the computer.Restart the computer by holding the “D” and Power button simultaneously.
From the above link click Manual and Documentation and then Service manual to access LCD reseat/remove section.
Before Opening the chassis, I recommend you to remove the battery and disconnect the adapter, press and hold the power button for few seconds and release to drain the flea power.
****NOTE: Please ensure that the power cable of the computer is disconnected before opening the chassis. Refer to the Service Manual for assistance on removing or replacing the internal components of the computer.
If the computer has active warranty I shall go ahead and arrange for a service.
Check warranty status: http://dell.to/10pMa86
Kindly private message me the service tag of the computer. To private message the service tag click my User name and click Start conversation.
Awaiting your response!