Hi, my 3 yr old dell 4600,s usb ports have all stopped working, i have a wireless keynoard and mouse, and i replaced these thinking it was those at first, but by plugging in a memory stick that flashes when being read, i now know that none of the usb ports are any good. i have tried a powered hub, but still no joy
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Re: dell 4600 usb ports not working
Do one thing disconnect all the devices connected to the usb and if possible use a ps2 mouse to do the step i am going to tell you or if u can use the keyboard that would be fine ...
go to device manager and uninstall all that is under universal serial bus ... remove everything that says root hub and than restart the system
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Please add more information to get specific assistance. Are these wireless devices? If wired, do they use USB or PS/2 connections.
For wireless devices, try replacing the batteries and resynching to the receiver. (You may want to check putting the receiver in different USB ports.)
For wired devices, disconnect and reconnect. For PS/2 devices, you will need to restart the computer to check if the devices work. For USB devices, try connecting to different USB ports.
Next step, try using a different keyboard and mouse (that work on another computer (stick to USB or PS/2 to match the current pair)). Try a wired set if the problem is with a wireless pair. If those work, continue diagnostics on the wireless keyboard and mouse. Check if the mouse and keyboard work on another computer. If they don't work with another computer, replace them.
If another USB keyboard and mouse pair don't work in any port, your USB ports may have failed. Check if even one port works enough to access the Device Manager. (Start > Control Panel > Hardware and Sound > Device Manager (Win7); similar directions in other versions of Windows) Check for a problem with the drivers (For USB ports, scroll down to the USB drivers and look for a triangle with a yellow exclamation point or red x). Try to update the driver or roll it back. If that doesn't help and one USB port works, a USB hub may solve the problem.
Otherwise if the USB or PS/2 ports do not work with any devices and the driver fix doesn't work, then I'd suspect a problem with the ports on the motherboard. Replace the motherboard/computer.
IF you already have a wireless router, than any pci wireless card will install in your dell. the instruction pamphlet is simple to follow.
Likewise Any USB wireless adaptor will pplug to any vacant usb port and connect, the instruction pamphlet is simple to follow.
is your mouse and keyboard plugged into a PS2 connector http://en.wikipedia.org/wiki/Image:Ps-2-ports.jpg look inside of your case and see if any capacitors are buldging on your motherboard the tops of the capacitors should be level/flat if they're ok, sounds like they are going, look for brown rusty color also around tops of capacitors, might be your outputs are going. If you have your mouse and keyboard plugged into ps2 ports try a USB Mouse and keyboard, borrow one first or buy a usb laser mouse for $12 worth a try even if your ps2 ports are blown, use the usb ports for mouse/keys ;)