Is there a 'Reset to factory' on my MP3 player?

My sons MP3 player is a Clicker 128mb USB with SD card slot. Software is Pocki MP3. He’s been using it for about a year now and is quite happy. Yesterday he replaced the battery and it does not turn on. If we connect to the PC we can read / write to it nd if we press the Q button, the internal light comes on.
Is there a way of resetting the unit to factory or is it dead?
many thanks