dell 8115 USB keyboard plug, can not restart

dell SK 8115 keyboard, USB keyboard plugged into the USB port on the back to find a normal, shut down after the restart but could not find, already identified, and unemployment after the resumption, but then pulled out to play Go in and find.Seek a solution.Good points.First of all, not ash into the reasons for the new keyboard, new motherboard, nor is it static, and why???

keyboard U and the first board of U I do not have any problems?
that is where the problems come?
recommendations:
1 to get another USB Try the keyboard, no.That is on the Main Board / U mouth / the system.If the line on your keyboard is a problem.
2 then set U / U mouth other equipment to see if the system can correctly identify, If so, that the keyboard is a problem.
If not, that is the Main Board / U mouth / systems.Bit if the fee.Just to say a few ways.
3 If you can not correctly identify the USB device, U I can be a shortage of power supply,
4 if the keyboard is no problem, U I do not question, search, you redo.See if it can identify, as in the system prior to remember the BIOS settings set to default.
If 5 or not.That is the question of the board, a proposal to find professionals to help you take a look at, OR repair.
Would like to help you., Http://www% 2E% 6A% 711% 641 .% 63% 6E