So recently I have found an old Sony Discman model D-F181. I tried to use it but it seems it's unable to play CDs. Whenever I put a disc in, it spins for a few seconds then it just gives up and shuts down. I tried putting a toothpick on the cover hatch thingy so that I can take a look inside and it seems the laser is functioning and it can also move normally so I'm not exactly sure why it won't play any discs. The radio feature seems to be working normally. Any help would be much appreciated. Thanks in advance.