Try removing all the USB devices in Windows Device Manager with the laptop docked. To do this: Right-click My Computer, left click Manage. On the right side of the window, click Device Manager. On the right side, click the + sign next to USB Devices. Highlight each device under this heading and hit Delete on your keybaord to remove all the devices in order. Then right-click Computer at the top of the list and click Scan for Hardware Changes.
Hopefully Windows will re-detect your USB devices and get them back operational.
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If all other ports on your docking station are working then this would point to either a hardware fault on the DS or with the DS drivers on the laptop, I would also make sure you have seated the laptop on the DS correctly as this can sometimes cause some ports to appear not to be working correctly
If the docking station fails, but you can charge via the computer, then the station is defective. Check the connections and the power supply to the Doc Station. A power surge may have damaged the power adapter to the station.
A docking station is an extension or addition of ports for a laptop computer. Once the portable computer is docked, you can access the docking station's ports, such as PS/2 or USB 2.0 ports, through your computer. Some docking stations have monitors that you can connect your computer to, placing your video on an external screen so you can turn off your computer's monitor and conserve some of your computer's energy. All Dell docking stations will have the same general troubleshooting steps.
Plug your laptop's power adapter into the docking station and dock your laptop onto/into the docking station. If there is no power going to your laptop from the docking station but it works when the power adapter is plugged into the wall, the docking station is bad and needs to be replaced. Plug your power adapter into the docking station and dock your laptop onto/into the docking station. If power goes on but your computer doesn't recognizes accessories such as a USB mouse--plugged into the docking station, try a different port on the station. If it works in a different port, the previous USB port is burned out. Plug your power adapter into the docking station and dock your laptop onto/into the docking station. If power is going through the docking station but no accessories are being recognized, you might have a corrupted docking profile. Undock the computer and dock it again once it has fully started up to reset the docking profile. Plug your power adapter into the docking station and dock your laptop onto/into the docking station. If you have an external monitor and it is not working, completely close the lid on the laptop so the image will move to the external monitor. Plug your power adapter into the docking station and dock your laptop onto/into the docking station. If power is going through the docking station but no accessories are being recognized and resetting the docking profile fails, update all drivers through Dell's support website and then re-dock the computer. Some of the software that runs the hardware may have become corrupted. Hope this helps
Most likely cause over on your part would be a bad connection from the dock to you. I am not an expert on laptop docks, but try to check that all the cables are nice and secure. Also, check that there is no stray objects in the connections. If all else fails, you may have a bad dock station.
You can try to update any system utilities drivers and docking station drivers. However, I found that with IBM and Gateway, when you remove a running machine from the docking station they tend to glitch just a bit and when you redock them they have issues. Your issue is the docking station attachments, I've also seen issues with the monitor only, mouse only and keyboard on the laptop, all not working. I've had a couple that if I used the "safely remove hardware" then they would work when removed then redocked, but not all machines give the safely remove hardware option with the docking station. If yours does, try that. If it doesn't and there are no driver updates or the updates don't work, then, unfortunately, I'm afraid you'll just have to live with restarting after every redock. One other thing you might try is, after redocking, do a hardware search. It may find the attachments. I know this is also a pain, but it may be easier than rebooting every time.
Turn the machine off and press the eject button on the dock. If you locked it then you need to turn the key for it to come out. The eject button usually has a picture of an up arrow over a horizontal line.