Reset up printer head

I am trying to reset up printer head
due to losing my “Pass Thru” button toggle…this is what I read to do.
when Trying to reset up printer head, I click continue and I get stuck on this page that says “Print Starting - The printer head is being centered” And that is all it will do. No movement with my Glowforge

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I’ve never reset my head, but the basic question with centering issues are:

Is there anything on the bed? If yes, does it have any holes in it?
Are the camera lens and the :glowforge: logo on the top of the head clean?
Do you have a strong (not necessarily fast) internet connection at 2.4?
How long did you leave it for?