Default HTC Desire HD A9191 - Charge only from pc usb cable

Hi, i'm having problems with my cell. Day by day it started not to charge from his charger. I had to plug and unplug it again till the led blinked.
A week ago it started not to charge any more from his charger. I've tried other 3 chargers but without any results.
So i tried to connect it to the pc through usb cable and magically it started charging.
Have anyone an idea about what the problem could be?
Thanx.