[morzh]

Well,


This is obviously a quick way, but eventually myself I always prefer to look at things with a scope whenever possible.

First, this is very educating. Nothing enhances your understanding of how circuit fiunctions as looking at the waveforms.
Second, the waveshape has in itself all the information you need for diagnostics.
If your oscillation is out of order the scope wil show it. If your audio amp has a crossover or limiting t what not, it will show it. If you have inrush or oscillation on power-up, it will show it.

I would recommend everyone - get a scope. A meter is like a stethoscope, and a scope is a finer tool like an EKG. Sometimes one is enough, sometimes you want to know more.