Senseito7 Wrote:faulty cable?

That sounds a lot like a faulty cable. Definately sure?

yammata684 Wrote:Might want to reflash your reformat your Flash1 in the recovery menu or if that doesn't work reflash your firmware.

If you've triad all of the above the actual USB connector on the PSP might be damaged. Have a look at it with a torch and a magnifying glass to see if all the pins are in place. If it is damages it's unlikely you'll be able to repair it without opening up the PSP and replacing the connector. It might be best to send it off to Sony if that's the case...