Most likely will be the small plastic coupler on the loading motor that is split. Should take no more than 20 minutes for anyone knowing what they are doing.
e-mail address to jo@durhamanglers.co.uk and I'll post one out to you. Just in the prroccess of dumping 25 years worth of accumulated TV/Vidoe spares
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cassette recorders.