Vostro 1720 USB issues

Hi,

I have been experiencing problems with my USB ports recently. (Vostro 1720 laptop, windows 7 32bit)

My 6 month old laptop now does not recognise USB flash drives,  and some divices.

My phone is no longer recognised.

Device that are recognised are not on USB2 and i get the message "This device could perform fast"

The integrated webcam does not work, windows is aware that it is there but i only ever see a black black video feed.

I have reinstalled drivers, updated everything and removed all power (including removing the battery) from the machine, but to no avail.

Does anyone know now I can get my Laptop so work again???

Many thanks in advance.

Vert

UPDATE : Working USB devices - Logitec QuickCam Pro 9000 webcam, HTC HT2 as modem or for active sync but fails as a USB flash drive.

UPDATE : Dell diagnostic comes up with a fail on DST for drive 0 error code 2000-0142, status 78.  6 months old and need new HDD!!! :emotion-6: