Hello, All 3 of my USB ports stopped working on my Acer Aspire 5100, they used to work fine with my phone and Ipod. Now whenever i plug something in, even my printer, it says "device not recognized". However, when I plug in my Ipod it charges, but the charging screen doesn't show up. I've tried resetting everything, and I still can't figure out what's wrong. Any ideas? Or is there another way to add a usb port through one of the holes on the side of my laptop?? Thank you so much!