My Sony MZ-N420D MD stopped recording all of a sudden. A common problem, I know, but there are a couple other things. The MD also won't erase tracks, and displays the "Edit" message forever if I try. The MD still plays discs, but at the start of every track, there's a high-pitched ring in the background that fades after about 5 seconds. The ring isn't a problem with the discs because they're discs I've listened to before without the background ringing. Also, I was able to get it to record and erase perfectly by removing the back cover and applying hard pressure to the area behind the laser. But I have to hold the pressure there if I want it to record.
Also, is there any way to raise or lower the laser lense?
Anyone know what the problem might be? Thanks in advance.