I've had my Sony walkman for about 2 years now, and it hasn't given me any problems. Its a 16 gb one that I got from walmart. Just a few days ago the volume began to act up, sometimes it would not do anything, other times it would flow through the menus, and other times it would actually turn the volume up/down (rarely)

I know the best thing would be to get another one, but I'm currently not able to spend a lot of money, and I wanted to see if there were any known fixes to the problem before I bought a new one. Any help would be appreciated.