I have an iPhone 5c with IOS 10.2.1 and it has worked with the dock without issue before and has worked since the update. The dock was dropped a few months ago but this didn't seem to do any damage and it was working without any problems for a wholeness after. More recently the connection between the power cable and the dock has been a little faulty. Eventually someone tried to use a different cable with it which had quite a loose fit but did work for a few hours, again with a dodgy connection. It finally stopped working and now only charges the phone. I later realised the new cable has a 20V output compared to the original which has a 12V output so I wondered if that might have damaged the logic board? If it does need replacing, where could I get one?