Noob alert: how to guide: replace faulty pixhawk unit

I have been sent a new pixhawk unit by 3dr as mine appears faulty, I now need to replace the unit in the IRIS+ and to be honest I’m terrified.

can anyone point me to a good step by step guide?

thanks

Alistair

try this one to get an idea
youtube.com/watch?v=qVMf4nP … e&t=18m10s