Could be a switch setting problem. Try this:


Hook a wire from ch1 input to the calibrator loop.
Ch1 input selector to "AC", 0.1V/cm, var knob all the way clockwise
until it clicks. vert mode press ch1 only DOWN, all other buttons in
this column OUT.

Set the two Position knobs staright up.

Sweep speed: 5 ms/cm var knob all the way clockwise until it clicks.

"x10" button OUT
Intensity 3/4 of the way up.


Press sweep mode: Auto
Sweep source: "A"

Press trigger source: Ch1, internal
Trigger mode: normal, AC

Turn the trigger A knob to pointing straight up. The "trig" light
should go on, if it doesnt, turn the knob until it does. You won't be
able to see ANYTHING until you can get the TRIG light to light up.
Work on this first.

Press the beam finder. You should see a bright but small square wave.
Now use the horiz and vertical position knobs to center the square
wave on the screen. release the beam-finder button and you should
see about five cycles of a square wave. You might have to adjust the
intensity and focus knobs for best appearance.