First things first. 99% of alle disk reading problems are caused by a faulty belt. In that case the CD tray is not placed in the exact position. Before recapping anything, change the belt for a new one and make sure the tray is placed correctly.
Why does everone instantly starts te change capacitors when things are not working all of a sudden. With this cd player 99% of failing to read disk is a belt problem wich does not put the tray in the exact position. Change belt first…see what happens.