Sony radio cd cassette player, cd works sometimes and sometimes not. pushed every button

SOURCE: How to preset a radio station on Sony CFD-S200 Cassette/CD boombox

You will need to use the Forward and Reverse buttons on the CD player. Set the station by holding the button you want to set it to until it blinks and shows the station number.
To set more that 10 stations. Press the (>10) button and then enter 11 or 12 or so on and set the stations the same as above.

SOURCE: CD player says "no disk" when there is disk in player.

Get a CD Cleaner and check your electric current output to make sure it matches the voltage requirement.

If the CD Cleaner doesnt work, then replace your CD Lens

SOURCE: We have a Sony model cfd-e75 radio cassette cd

Heres your manual

http://www.manualshark.org/manualshark/files/4/pdf_1368.pdf