This multi-CD player was an e-bay purchase and was not reading any discs, to say why would take away the surprise of the diagnosis part way through the video. Suffice to say it was a fairly common fault for these units and thanks to another e-bay purchase of a similar unit for parts, I was able to restore normal operation. We'll look at the mechanism and how to fit the replacement part and then a brief overview of testing both with an oscilloscope and adjustments.