@decee 

And how are you powering this remote AP and what model is it?  You need a POE and possibly POE+ injector at one end of your 200' cable to make that AP light up.

If you'd had a v1 Starlink system, I would have suggested you unplug the Starlink router from the power box and plug your AP into it directly and use the POE that normally feeds your router to confirm AP boot up.  However the v2 system is integrated and you can't do that anymore

  @decee 

Ok, a couple of things.

How did you test the cable?  Passing data isn't enough, that only tests 4 of the 8 wires potentially.  If even 1 of your connections isn't solid on the POE wires, you will likely not be able to pass sufficient power through 200' of cable...and the blinking sequence you are experiencing would tend to indicate that the AP is receiving some power, but for some reason, not enough to remain up and stable.

Can you test the AP locally, using just the AP, the POE injector and a short patch cable from the POE port to the AP.  Verify that the AP comes up and the light remains on and stable for several minutes.  If it cannot do this across your 200' cable I think you have your answer.  If you don't have a cable tester, then I'd suggest reconnectoring both ends again.

Verify that the POE injector you received is in fact the 48V version and NOT the 24V version (which looks damn near identical).  This AP requires 48V, whether passive or active POE, the supplied injector should be a passive 48V model.

  @decee LOL....I have one of those testers too :)

Ok, sounds like you should have everything you need.  I would definitely make sure the AP works (I hope it's with you and not 100mi away) before heading back.

I had the v1 round Starlink, but I assume that with the v2, the ethernet adapter allows you to get a dynamic IP via DHCP from the Starlink router's LAN side?  You can test this by jacking your laptop into the ethernet port of the Starlink and verifying you get a valid IP and can surf the web.  When you connect the AP it should get an IP the same way, and you should test this with two patch cables, one from Starlink ethernet adapter to POE injector LAN, and the second from the 245v3 to the POE injector POE port.

At this point, since you are controller-less, you'll need to figure out the IP assigned to the AP (look in the Clients list on the Starlink router).  Connect your laptop wirelessly to the Starlink Wifi and then point your browser at the IP assigned to the 245v3.  Login with the default user/passwd (see the Quickstart sheet in the box).  Proceed to configure the AP as a standalone device,ie set up your radios and SSIDs.  You should be able to test now.

If your AP doesn't get an IP address from Starlink, try factory resetting it via the little button and retrying the above.