Ok, here's what you do.
Power down your amp, flip over the faceplate, do the voltage checks and all that yadda yadda. but here's the fun part.
While you're holding both probes from your meter in your hands, touching a couple of connections, roll your chair leg over some shipping bubble wrap that just happens to be laying on the floor! Whoo howdy. If that doesn't get your heart racing you're already dead. jee suz. snap, crackle pop.
Esoteric DV-50, Technics SL1200-M3D, B&K Phono 10 Preamp, Sumiko Blue Point Special Evo III, Bottlehead Stereomour, Orca's