what to do my pc says no keyboard not found

Dell Optiplex 360 dt desktop computer (i...
June 22, 2010 at 13:28:36
Specs: Windows XP
my pc say keyboard not found plug in a usb keyboard or press F2 go into setup

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June 22, 2010 at 14:43:32
Try using a PS/2 keyboard.

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June 22, 2010 at 15:47:48
USB devices may not work correctly when they're connected to certain USB ports e.g. ports in a hub or on the front of a desktop case. If you have a desktop computer, you may have an IRQ sharing problem you need to fix, or your power supply may be starting to fail.
See response 3 in this:

Also - if you are using a USB extension cable that did NOT come with the device, some of them have inadequate wiring and will not work properly with some USB devices.

Corded keyboards often develop broken wires inside the cable, usually near where the cord enters the keyboard, after the keyboard has been used a lot, or at any time if the cord has been yanked on. Try the keyboard with another computer to make sure it works, or try another keyboard with your computer
In order to get into the the bios Setup with a USB connected keyboard, the bios has to have Legacy USB or USB Keyboard or similar enabled in it's settings.

A wireless keyboard, which has a USB connected transmitter/receiver module - probably won't work until AFTER the software has been installed for it - usually you must install the software for it BEFORE you plug into the USB port - plus you may need to do something to activate the keyboard after that has been installed (e.g. some have a switch, so that the batteries in the keyboard can be preserved when you aren't using the keyboard) . Read the installation directions for the wireless keyboard.

If you use a simple gender adapter to convert a PS/2 connection on the end of the cord to USB, the keyboard must be a "combo" keyboard that is wired up and designed to be used with either a PS/2 or a USB connection, otherwise the adapter cannot make the keyboard work connected to a USB port.
There are two types of PS/2 (female) to USB (male) simple gender adapters - the ones for keyboards are often purple - the ones for mice are often green - the two types of adapters are usually wired up differently - an adapter for a mouse usually won't work with a "combo" keyboard, and an adapter for a keyboard usually won't work with a "combo" mouse.

A corded usb connected keyboard should work while booting and in Windows right way when you first plug it in (assuming that it's plugged into a USB port it can actually work with, and your USB controllers are enabled in the mboard's bios Setup).

However, in order for you to be able to get into the bios Setup with a USB connected keyboard, the keyboard must be plugged into a USB port connected to the mboard, not a port in a controller card in a mboard slot, and Legacy USB Devices, or USB Keyboard, or similar, must be enabled in the mboard's bios Setup. In newer bioses, that usually is enabled by default; in older bioses, it may NOT be enabled by default.
If you can't get into the bios Setup with a USB keyboard, you can always get into it with a PS/2 keyboard, and change that setting.

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