I have a Alba MP4200BUK and it worked well to start of with. But after listening to two books it no longer works. I have checked whether the files are on it correctly and the computer shows they are, but it is not playing. The red led switches on when I turn it on, but is contineous instead of intermittent. I have charged it so that is not the problem either. The headphones work fine with other products, so they are not at fault. There is no sound at all when I switch on the MP player.