Uno won't power up or load a sketch - gets hot

When I plug in my Arduino Uno to the USB on my laptop, it no longer powers up the board and it will not load a sketch. I get a message that says "A USB device has malfunctioned and exceeded the power limits of it's port hub. You should disconnect the device". In addition, the board gets extremely hot quickly.

I originally thought that something had malfunctioned on the Arduino but I purchased a new one and the same thing happened. I have tried multiple USB cables and all of the USB ports on my PC.

Any suggestions?

RESOLVED... I had the display attached to the arduino incorrectly. :o