Originally Posted by
lin821
Please don't take it personally. I just want to be sure that you'd covered all the basics and obvious.
Did you double-check and make sure everything is still attached and nothing come loose from your desktop?
I did check for any loose connection, and found none. Since it is a wireless device (via blue-tooth??), I checked the device that plugs into a USB port first thing (I think this device supports both the keyboard & mouse; mouse works fine). Cleaned the terminal and re-plugged in back in.