Fixya, I was called to correct

Fixya, I was called to correct a 51.2K error on a HP 4600, I changed the (Black) Laser Scanner rebuilt the printer. After replaced all my panels, I powered up the device; it cycled the power fine but then it gave me a 13.0A error -Jam in top area. But no jam was present. I noticed on my detail and inspection that the "fuser inlet sensor (PS11)" was loose and the housing does not allow it to stay in place when the fuser is installed. What are the proper steps to correct this error and get the unit up and running ? Sincerely, Carlt322