7 minutes ago, PeterJames said:

I expected the bell to sound, but it seems that it did. but you omitted to tell us 

Until I swapped the fuses, I had no idea if it was fuses, pcb or cpu. When I spotted the blown keypad fuse, I feared that you may have been right about the pcb, but when I removed the bell fuse, and the bell boxes sounded, I knew that fuse was good, so inserting it in the keypad slot, to see if they were ok, proved it was just a blown fuse and everything was ok, now all I need is to locate a replacement fuse

1 hour ago, PeterJames said:

But what should have happened when he removed the bell fuse?

Yes at that point, but when the rkp fuse blew then no. 

Anyway, it's all sorted and thanks for the update. 

1 hour ago, PeterJames said:

I expected the bell to sound, but it seems that it did. but you omitted to tell us 

Lol he didn't read it all again

5 hours ago, Jim Mac said:

Norman you were correct, When I checked the keypad fuse it had blown, but when I swapped the bell fuse with keypad fuse, the keypad came back on and the bellbox sounded, so unit is fine, I just need to source a 500mA 20mmx5mm anti-surge, quick blow fuse

Like here pete