Believe it or not, I have another problem. After I took some pictures with the S5, I plugged the phone into the pc. It said it wasn't charging. Ok, fine, just use the mtp to transfer the pictures. Then it showed the charging lightning bolt. Then it showed a yellow no battery symbol. I tried plugging and replugging, both there and with the original charger. I keep getting the same thing. At least at first it seemed to be rebooting, showing the Samsung screen. Then it stopped doing that. I don't know what I could have done wrong, beyond letting the cord get unplugged from the phone while I was carrying it to the pc. PLEASE help! Please tell me I didn't waste $80 on a used phone.