It’s true!! My iPod classic wouldn’t respond and just showed a big red X in a res circle. I tried everything and was about to spend loads of money at the Apple store for them to fix and found this advice on the net. “smack your iPod down hard on a table, charging port first”. No way, that’s crazy. Insane. Reckless. Irresponsible. BUT IT WORKS!!!!! I did it and it worked a treat. Incredible but true. Enjoy!!!!!!!!!!!!!!!!!!