Can someone help identify this part?

Hey All!

Deep in the weeds with this THUNDERBOLT 27" display -I have no screen, and the thunderbolt connection not detected by an external computer, but power is getting to the logic board just fine. Tested the G, 12V, and 24V rails and power is fine on the logic board. When testing the smaller panel test points, fan, usb, etc. works great, but no power at the LCD power panel test points (Just to the left of the circled component in the pic attached). There should be 12v there according to the Technician's manual.

Ok, but there IS 12V right at the circled component on the one leg at the bottom, but 0 volts on either of the other two legs! So I suspect this part has failed.

Now the help! What is this part? Voltage divider or detector? It's labeled with either a "AM K" or "1 AM K" (K is sideways) although the 1 might just be a line indicating directionality? These components are all over the board and always gives voltage readings on all legs, so that's why I suspect this one is bad. Any super smart SMD folks know what this part is?