You can't change it, but you can disable it.
Login to the MFP as admin and go to Machine Status > Tools > Device Settings > General > System Administrator Reports > Machine Configuration Report > Do Not Print Report at Power On > Save > Exit Tools
Is there a way to change the powerup printout that shows the stats on a Xerox Phaser 3635MFP? We do not look at the printout, just pitch it.
If we could install another output, such as a form we reguarly use that would exercise the printer, the output could be useful and save resources.