I just received my Homepatrol for the purpose of listening to the local county dispatch - Morris County MIRS system. I am not terribly savvy with electronics but was able to figure out through this website that I most likely needed to update my firmware. OK -i think i did that - it says version 2.05 now when the website dated 10/14 is recommending something with a lower #. Is there a reason why this wouldn't pick up the MIRS transmissions? I know that it does work from talking to others.
Have you updated the database in the scanner using Sentinel?
If not, that could be part of the problem.
Also make sure that you have the correct service types enabled, and if using location control and the full database, that you have the correct
location entered, as well as the range.
Rather than using the full database, you may be better off creating a Favorites list by appending from the database, adding the systems that you want to hear. Check out the videos section on this Wiki
page. Those are relating to the 436HP & 536HP, but the append operation to create a list is the same in the Sentinel versions for both the x36HP scanners, as well as the two Home Patrols (HP-1 & HP-2).