Usb port

[subhransu123]

i have intel pentium 4 2.4 GHz pc which has win xp.my problem is that the 4 usb port are not working,if any new h/w is inserted it don't display any "found new h/w" message .so, is this problem happened due to h/w or s/w ?pls reply and also reply the sollution........

[asingh]

^^
Open the cabinet, and reconnect the USB hub wires again to the motherboard headers.