ERROR CODE 5——Yes, It can be a HD ribbon ZIF cable loose , BUT 99% of the time the Hard Drive has gone bad. No Fix other than replacement. I have many ZUNE 120Gb players & One at a time the hard drives went bad. No reasons—not dropped. I found the best repair is sending them to RAPID REPAIR. For $20.00 they will diagnose & give you an estimate. The smartest repair is having the Hard Drive (which is mechanical & will go out again) Replaced with a SSD digital drive. No moving parts, Solid state Memory, WITH a plus that they can replace the 120Gb drive with a 128Gb drive with extra memory. I’ve now have all 4 of mine done, Some with a new battery at Approx. $ 200. each or less. Just don’t throw that old ZUNE away ! Even broken, It’s worth big money on EBAY to guys & girls looking for parts that are NLA to fix their’s. Hope this advice works for all that live with ZUNE everyday like me. The best player ever on the market & A SHAME that MS ever ever stopped producing. But then again MS has never done too much right other than make the best music player on the market.