USB Problems?

Hello, I sincerely hope that you can help me. I have a Mecer laptop, running Win XP. It has 3 USB ports which I usually connect to hub/s. This has always worked fine.

Today my screen turned black whilst taking my mobile USB connection out and after that all three ports on the laptop is non-functional. If I plug the usb hubs in or the mobile I get power but no detection whatsovever; if I put a flash disk in it seems as if there is also no power.

I did uninstall and reinstall (was detected automatically); disable and enable the controllers and hubs.


I am dependent on the computer for my income and all my work is on external hard drives working with USB; this puts me in a pretty big fix. Can you assist in anyway.

Thanking you ever so much.

Tanya