I have a usb keyboard that has gone strange. The 4 lights flash together every 5 seconds or so and I thought it was bust. It sometimes types but then it doesn't. I unplugged it and tried a spare ps2 keyboard that I knew worked but that didn't do anything (I did reboot). I decided to plug the usb keyboard in the front and now it works fine. Could the usb ports at the back be faulty?
How bizarre I have tried other usb devices in the ports and they work fine. I have plugged the keyboard in it and it now works ok!!! Could it be having a funny 5 minutes? Although it did last for a day!! Or could the keyboard or usb ports be on the way out?