10 hours ago, al-yeti said:

So going back it seems you think both keypads work 

 

But are sending line 2 downstairs 

 

 

Why not just put everything on to line 1?

None of the lines are working, not even line 1. If I connect my keypads to the other panel (new) it works perfectly. So I now know the issue is with the panel and it affects all the AB lines. Is there a way I can get this fixed or what could be the problem?

1 hour ago, Tens6306 said:

None of the lines are working, not even line 1. If I connect my keypads to the other panel (new) it works perfectly. So I now know the issue is with the panel and it affects all the AB lines. Is there a way I can get this fixed or what could be the problem?

Well I assume eBay new panel doesn't work so forget it 

so even if you only have 1 keypad connected on line 1 addressed as 1 it still doesnt work. Have you also tried a temp small cable just out of the panel to prove the wiring?