Thanks to all replies but gave up, spoke to TM that headed me in the right direction and it is now possible to re program the mac codes, however it requires a 9 pin 232 serial cable, I have one and got another both with serial to usb but are garbage cables that win 10 wont install drivers, probably because the cables are copies. Anyway TM have been so helpful and I have spent waay to much time I will send to them on Monday.
http://www.downloadtmsw.com/bbs/main.php
Scroll down to manuals
Open how to fix mac .. there are how to guides and everything necessary to do the job.. If you have the correct cables. Would like to add that when the manual says power off it means at the rear of the box


Thanks again guys