You gave more insight that I had couple hours back. Thanks for all the help!
If you can bring any kind of probe to connect to the compensation output - do that. If not, then at least a wire you can use as an antenna for 60Hz pickup, etc.
Very basic things to check:
- run the vertical attenuator (scale) through each range, hopefully with a signal attached. You should be able to see if it works over at least part of the range with the comp signal.
- run the sweep control through each of it's steps to be sure you get a trace/sweep at each s/div setting - no dead settings.
- if you're familiar with the trigger controls - check that AUTO gives you a trace regardless of settings, and that when set to NORMal, that LINE and INT trigger modes work as expected.
- With no input (or shorted input, or input coupling set to GND), the trace should be flat (no 60/120 ripple).
- trace should be focus-able with focus control
- trace should be bright enough to see without setting intensity to max (although you might be at/near max at the fastest sweep speed - this is ok)
- make sure vertical and horizontal position controls are near center (not too far towards one extreme or the other) when trace is centered.