The Blu-ray disc drive if damaged in a certain way will produce this specific problem. We repair it. It is a one solution to a 2 problem issue.
First you can not update your system due to the SU 42118-6 error, you also can not use your disc drive as it is not pulling in the disc or ejecting it.
I explained my issue and was given a few options. I mailed the system and it arrived in a couple of days. Though the repair was super fast less than a day. Console ships quick after payment is made. Got the ps4 day after repair was done. Very good job.