The following suggestion from Dell Cares resolved the issue. Try a clean installation of the intel video driver.For this, go to Device Manager > Display adapters > Right-click on Intel driver > let me know the driver version listed here. Then, proceed to uninstall it. If you get a prompt to delete the driver, click on the check box and proceed.Once done, restart the system and check if the same issue is noticed.Then, download the latest Intel Video driver from the Dell support site and install it.
My computer display turns weird (grey-style with weird vertical lines) once the computer wakes from sleep or when the lid is shut and opened. This started happening after a recent automatic update.  
Inspiron 5410 graphics get weird after it wakes from sleep