Disc Memo "Fault" on Sony CDS-707ESD

Is anyone familiar with the meaning of this fault and also what the current laser pick-up is for this unit? Believe it was initially a KSS-190A. I am pretty inexperienced here. Believe there is also a problem with the transport screw as it does not seem to engage with anything.

I am eager to play it and compare sound. Thanks for any help.
The laser is not current as in not available anymore. What are you going to compare it with, have alot of lens cleaning fluid on hand.
If it turns out to be the KSS-190A laser, you'll be out of luck as they are simply unavailable. I know because I tried to find one for my Sony RAS-1. The closest I came was an NOS unit in Germany for $1,000 without any guarantee-no thanks!