USB's not working

Got a Dell Precision 360 which none of the USB ports work, it has 5 on the back and 2 on the front and none work, they supply power as a mouse the light comes on, on a memory stick again the light comes on but neither work.  i have updated Bios and reformated hard drive and reloaded Windows XP prof, bios says usbs sre enabled.  Not sure what else i can do.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Can you use usb mouse? if so, it is working. I would test the usb stick on other PC to verify it works ok first.
Check in Device Manager and usn entries there see if any yellow mark?
kev-griggsAuthor Commented:
Hi Punky
No, mouse does not work, the optical light comes on and both usb stick and mouse work on another machine.  Device manager is clean, ie no exclamation marks.
if it does not work on a fresh install, you have bad hardware.
any errors in device manager ?
i suppose you did install all the motherboard drivers ? here they are :

you can also test if a PCI to usb card works
kev-griggsAuthor Commented:
Hi nobus

Yes i did install the chipset drivers, there are 2 sets of usb's, 2 on the front and 5 on the back,  if it was hardware i would not expect both sets not to work, or an i wront with that assumption?
yes you are wrong, it comes from the same chip

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.