I have a HP Laserjet Pro 400 color MFP m475dw. I am running OSX Snow Leopard.
While I was cleaning dust from the control panel touch screen, it spontaneously decided to calibrate the touch screen (when swiping over the screen I probably got extremely (un)lucky). Problem is that I can't find any way to start the touch screen calibration from outside the touch screen control panel and the only way I've found to do a factory reset on the damn thing is through the menus in the touch screen.
Is there a magic dance I can do when restarting the printer to get it back to factory defaults, or better, anyway to start the screen calibration?
Update:
The touchscreen is totally out of whack, meaning that the locations I press on the touch screen don't cause a response in the same location in the printer. This means, for example, that to press "Settings" on the printer means pressing somewhere near the center of the touch screen. This also means that some buttons are (or at least, seem) totally inaccessible.
Best Answer
With a newer firmware, the calibration is started from the integrated web configuration facility, which can be reached with the HP Utility on OS X, via the "Open embedded web server" button.
From there, navigating to System -> Service, there is a "Start calibration" button. Pressing this gave me the touch screen calibration screen on the printer and it actually worked this time.