Hard Disk Failure Back up your files immediately to prevent information loss, and then contact the computer manufacturer to determine if you need to repair or replace the disk.

Oddly enough it seems that the track pad/mouse pointer stops working when the screen is black. e.g. during the time the screen is black the pointer on the screen doesn't move. I thought it might be related to the back light on the keyboard or the touch buttons.

We are having a Dell power connect 2748 switch. We have been facing an unusual problem. This switch is uplinked to a Cisco L3 switch which inturn caters to the WAN Connectivity.