Gave up with the other one I bought and took a chance and bought another 2nd hand which was sold as for spares etc as not working with a dead battery. Replaced battery that I had purchased for my previous purchase and installed new firmware and hey presto working perfectly. Came with no psu which was no problem as used my old one. Great purchase as it is in immaculate condition cosmetically and all for £15.99! At last a risky purchase that has been a great one!