Thanks - see it and reviewing...
The log reveals the firmware update completed successfully and is operating as expected.
There's some later general ATC USB communication errors during a program run, but none of that was changed at all with the new firmware. Suspect you may have some USB cabling ends coming loose due to vibration at times or possible interference unrelated to 2.7.3 changes. I don't see in the logs any revert back to 2.7.2. Recheck the usb connections and/or possibly try an alternate cable as a troubleshooting isolating step.
If you're there, pop the lid on the ATC cabinet after pushing in the e-stop button. After unscrewing the e-stop, watch the control board carefully as someone else pushes in the power button. Do you see the any LEDs lighting up on the board as power is gained?
Sounds like something more involved may be going on that just happened to be soon after 2.7.3, but unrelated to the actual firmware itself from what the logs show. Will reply directly to your other email and take this offline for now given the noise.
Just wanted to mention my new 8l lathe has also started acting flakey after this update.
Is it something more involved going on, maybe. I do think its pp related either way? I am trouble shooting as I get time. I did send an email to tech support about the issue that just started.