Hi Eric,
Yes I did he probe test, whichever probe I use will deflect around 3v higher when touched to the test hole, but not a square wave, just a straight trace.
I'm guessing mine doesn't have a Square wave output, I will have to read through the service manual again to check.
Al
hi,
What have you got the TIME/CM switch set too.?
If its fast, the square wave from the probe test could look like a straight line.!!!
Switch to 50mS/sec. try again.
What do you get when you touch the probe with your finger [ 5mV/CM setting]