YP-R0 always "under charging" even without charging
I've this problem since this monday. My mp3 even without any cable on it will turn on with "Under charging" message, one instant later "USB disconnected" and it will repeat this always and always untill the battery die. If i turn on my mp3 i got some lag due to charge and unplug "simulation" :O I don't know how to fix this. I've tried to disconnect the battery for a while (i opened my mp3 to do this), but it didn't fix the problem. I've putted the last firmware (2.20) but the problem is always here. I'm thinking there is some contact inside the usb connector maybe. Or i've to break it and buy a new mp3 xD
What can i do to know what happening to my mp3?
Sorry for my bad english :P