Roland Man PR00 Practica - Error 1003???

Hi!

Have problem with Roland-Man PR00 Practica. Its starting and everything seems to be nice ... but when push the stop button its stop of course and then displaying Error 1003!!! Afterwords must turn it off for able to do anything! A lot of technical and electronic people check it out ... but no succsess ... yet found nothing ... well work's stoped ... and problems beggining ...
If someone can help will be great ... can write to e-mail moonnow@inbox.lv

Thanks for all impossible or animossible information