PS4 Disc Drive Troubleshooting: Disc Drive does not receive or eject any discs. Does not read discs either

I’m having some trouble with a disc drive for the ps4 slim. No mechanical issues such as rollers or gears, but none of the mechanical parts operate because neither motor runs. The first switch on the KLD-004 board turns on the ps4, but the other switch does not begin the insertion/ejection of any disc. Also, I know about the fuses, and I checked both 6201 and 6202. They are good. And I receive an error code during system updates: SU-42118-6. I just wanted to see if there were any other things I can check to fix this issue.