Internal part issue: Part is loose in area under toner and drum

[jlilytut]

My printer will no longer print. I removed the toner cartridge and drum and underneath those was a blue plastic 1/2 circle that was wrapped with rubber, laying loose in the middle of the black plastic tray. It appears to have been attached to the metal rod, but I cannot figure out how to re-attach it. The part has 2 short posts on either side. 

[Valsimot · Accepted solution]

https://www.youtube.com/watch?v=hLSsg4ijv1U