Hi,
so if it was debounce being set to low ,the led would flicker in the diag screen ?
No, I don't think so. The LED on the diagnostic screen is not that fast, that is to say if the input signal
did flicker is a manner to cause Mach to record a probe strike it may be that the LED does not respond at all.
The LED is a useful diagnostic tool to see whether the probe circuit is working but not good enough to diagnose
noise problems.
Can you post the g31 code you are using to test the probe?
Craig