I've just bought a faulty Zen Vision (not the M nor the W) to fix mine that has a faulty motherboard. The advert said that the hard drive was faulty and was removed to it was the perfect candidate for me.
It was sad to find out that the player keeps going to recovery mode even with my hard drive (that I'm sure it's fine because I've tested it on another player along with it's flat cable). This confirms one time more (if it was still necessary) that the Zens have some kind of recurring fault with the hard drive controller. Is it possible that there isn't anyone out there that has a clue about this?