LG GCC-4521B cannot read any disk

[chth96]

I bought 6 second hands odd $5 at a flea market and I found that 2 odd(GCC-4521B,TS-H192) won't read any disk.
But I measured all ESR value of SMD capacitor which is located on the TS-H192's PCB and replaced two capacitor which has higher ESR value.
And To My joy,this TS-H192 odd finally recognized burned CD as well as pressed CD.😂
But there was no more good fortune for GCC-4521B..In order to dead GCC-4521B back to life, I replaced three capacitor which has higher ESR value and I rubbed silicon grease on the every glides.I even brushed lens with cotton swab which was soaked by Isopropyl Alcohol 99% and I rotated pot to clockwise very slightly.
But All of my efforts is in vain.It still won't read any disk at all..
Is there any clue to fix not able to read any disk in LG GCC-4521B drive?

I created below dropbox link which demonstrate how long GCC-4521B struggle to read disk..

https://www.dropbox.com/scl/fi/pnst3...bequdizt3&dl=0