C 118 weird issue

[Blizzoo]

Hello techs
A customer have this old box,500k plus and the copies come out good but randomly gives a wrong copied image flip/reverse/bad centering,it's not in the same place.Same thing using by-pass,default tray (had no one extra tray) from copying through ADF,Platen Glass.I didn't print anything to it because is used just to copy.
The IIT is cleaned,the rails are greased and looks fine.
Could be the IIT Flat Cables,Ros or a bad board?
I don't have spares to test and i like to know the right cause before announce the customer

[Blizzoo]

This random puzzle effect it's from MCU-PWB.
After a while another customer complained with the same issue on a M118 ,weird.This happens even printing from PC.
Case closed