I do have a question(s) about the use of an oscilloscope which I couldn't find yet the answers. Can we use an oscilloscope to actually find issues? Any video I saw is always the same, explaining the function of some controls then using a signal generator to show the wave... I do board level repair using a multimeter and a Amscope, when having a schematic just trace the voltages, using alcohol for shorts if the board has a billion of caps. So I bought an used scope from a retired engineer and still there, that's great to impress people when they see that but I really want to know how to use the scope, how to troubleshoot a circuit which I don't have schematics. Where should I look? Whats the output patterns? etc... Can actually an oscilloscope be used for that?