If you tried to move the laser arm while the machine was on, it is supposed to be difficult to move. Turn the machine off, then gently move the laser arm forward and back by hand to see if it binds on anything.
Stuck on centering can be caused by a dropped signal, a broken wire inside the lid cable, or several other issues. If you want to run through the checklist it is laid out below. Let support know what you tried off of the list.