Hi Kyle, This could be a video adapter hardware problem, but let's assume it's a driver malfunction first. When the system is working OK uninstall the video driver. Dell says that this model has an ATI Radeon Xpress 1150 video adapter. OK, so go into Control Panel:
Control Panel > System > Hardware tab > Device Manager button
Click the plus sign to the left of 'Display adapters'. You will see the ATI model listed. Right-click on the listing and click Properties. Click the Driver tab. Click the Uninstall button. Restart your laptop. This will force an automatic reinstall of the video drivers for your adapter. Run your laptop normally to see if the video lines appear again (or not).
If the video lines do come back, go to this Dell site and download and install the ATI video driver. Perhaps there is an improved driver there. http://support.dell.com/support/downloads/...tid=&impid=
The video driver is the very last entry on the page. This driver is dated 6/18/2007 so it's likely that this is a new version since your notebook isn't being manufactured anymore.
If the video lines still come back then it is most likely that the video adapter is defective. It's marginal, actually, since it doesn't happen all the time. You didn't say whether your machine is still under warranty, but you need to get it repaired, or else live with the occasional problem.