why would the back panel USB ports not work?

[rayancaleb]

Hi,
       I was looking at a computer that my mother was asking me to try and fix, I asked what was wrong with it and she said that her friend said it was just not working and that she didn't know what was wrong with it.

I take the back panel of and look at it to see is there are any key things I can spot right away, mind you, I have never fixed a computer before and I have just partially built my first one about a week ago.

the insides are all dusty so I clean it out to the best of my ability with some paper towels while watching out to not brake or touch anything important. I didn't get all the dust out but i got most of it. I plug it into the outlet and the monitor and it starts up fine and gets to the log in page, I plug in the mouse and keyboard so I can log in to make sure everything works and the mouse and keyboard don't work.

I know the mouse and keyboard are not broken so would anything in particular cause this? did I do anything wrong when cleaning it?


Please help.

Thanks!

I didn't find the right solution from the Internet.

References:
www.cnet.com/forums/discussions/why-would-the-back-panel-usb-ports-not-work/


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