I have a 2008 Beaver PT. 
I have a TriMark grab handle with a keypad (door bell).  (the Grab handle hasn't worked sense I have owned the coach) I call TRI Mark and purchaseD a new keypad because I'm assuming that there is a problem with it because the key fob and the remainder of the system seams to be functioning using the fob. Nothing on the handle pad seams to works. 
I checked the power and I have 12v.  So gave the information to TriMark and they sent me a new pad costing around 90.00 PN 24297-01. 
After ordering  and receiving the new part...I disassembled the Handle and found the pad had a PN 21987-01   Trimark told me this PN is obsolete.  So decided to contact Monaco and they have the 21987-01 in stock and it costs 452.30 that's a far cry from 90.00. 
 
  Are there any other options before I spend 452.00 to make sure this is the problem?
Kevin