@k-man
I just want to login (after 2 years) and say that I am in the same boat as you when it comes to a bio-metrics appointment. I never received the online access code or any mail about a bio-metrics appointment. I am approaching close to 3 weeks with no updates. It was definitely faster for me 2 years ago, however this time around my receipt # starts with IOE instead of LIN.
Timeline:
Submitted 2nd renewal: 5/5/16
I-797C Receipt: 5/9/16