Blue device is an inductor, like the one next to it. If high resistance it will be open circuit, as it looks like it has cooked in the image. The black item to the left is a SMD common mode choke, it should have conductivity on the top 2 pins, and the bottom 2 pins, with high resistance otherwise. The SMD device is an opamp, and this has likely been blown, along with the inductors and the common mode choke, by somebody applying either RF at high power or DC to the output. The replacement has been discussed here before, it is a common very high bandwidth LT part. I would also chech the sSMD device between the relays, near TP329, as it looks like it is a voltage clamp that might be faulty.