a day late but i don't think you need load on it to make sure you don't short the PSU out load is there to make sure it runs under load *burn mm: https://superuser.com/questions/507415/can-i-damage-a-psu-if-i-test-it-without-applying-it-a-load I certainly don't think you'd damage it in the minute it takes to make sure it's producing the right voltages maybe it would run too hot or something i think voltages can be a bit diff without load i think it's less regulated regardless sticking some load on is probably better if you want to test voltages being within spec. but load shouldn't be needed to tell if you have dead fuse or osmething yeah you guys seem to be right i guess voltages would shoot up i think it's not by that much like 10% or something and I'm not sure what the circuit looks like, but parts of it may not even be a active when not connected to anything that'd make sense It's easy for a power supply to fail under load, but unloaded appear fine (first-hand experience) This is way, way too fucking funny to me right now http://cube-drone.com//2014_11_16-99_Ingenuity.html