? Wrong Cable Box ?

I have a three TV system. There are no problems using APPS (Prime & Netflix) on the main TV. Recently both of the secondary TV's refused to connect to any APPS without updating their Cable Boxes. The new Cable Boxes I've received are XiD-p type. They have no component inputs, only HDMI. My system uses Component Video Inputs, and therefore I cannot update using the supplied equipment.  What do I do now?  Both of my existing secondary Cable Boxes are part #:PR150BNM

Thx,

BarryT