Recently we tried to start up an old MP3 player which had never been used. It is a YP-U3.
When it is plugged in to the computer it starts up, and it is even possible to add audiofiles to it through the accompannying software "Samsung Media Studio". However, after having charged the battery and added the files, once you eject the device from the computer, it is completely dead and does not respond to anything.
Does anyone have any kind suggestions?