I own a pico for about 2 months. Recently it refuses to charge and switch on. LCD screen flashes on and off showing resistance but zero voltage when plugged in to a socket. Screen only remains on when battery cap is removed and battery is taken out. Still shows charging when battery is removed. Theoretically impossible but its happening. Multimeter shows the battery currently at 3.4v. I suspect its software error. Any advice would be appreciated. Tnx