Shatterwell: It charges fine, still shows all the contacts, but shows 'no signal' and there is no dial tone. It will not allow me to enter the menu to make any changes. Any ideas anyone?
Assuming your Beocom 6000 is a Mark I, then you have the classic problem where the RF chip has failed on the PCB
If you have a Mark I Beocom 6000, then you dial face will look like THIS
You can no longer get the Mark I PCB because the RF chips are no longer made, but you can get an upgrade kit which will make it into a Mark II