MDO3054 Automaticaly Toggling Relay

I have a MDO3054 that began randomly triggering relay when I was performing measurements, with or without any input on the probes or change of settings. The relay has no effect on the result. It's an audible click when it triggers. Do you know what could be causing this?

Also, I we use the TPP0500B series probes with our oscilloscopes, and I notice that the scope says that “Termination is set by TPP0550B”. Am I correct in assuming that with a TPP0500B plugged in the operator should not be able to alter the termination manually via button or programming?

The audible relay clicks are from the 50 ohm to 1M ohm path changing. This can only be done via front panel button or programming commands. If just doing this on it's own, I would say there is a problem with the front panel and or the buttons. It could be a failing part or a wire connection.

Below is a link to the service manual if you want to do more investigation on your own.
https://www.tek.com/en/oscilloscope/mdo3000-mixed-domain-oscilloscope-manual/mdo3000

Or you can send the unit into our factory service team.
To set up a repair RMA (model and serial number)
call 1-800-833-9200 opt 2.
Or send an email to rmarequest@tektronix.com
https://www.tek.com/en/services/repair/mytek_rma_requestHi

Regarding the TPP0500Bs, yes you are correct in that when the TPP0500B is connected, the operator should not be able to alter the termination manually via button or programming.