Hi. I bought an RNS-E a couple of months ago with a DVD-R disc inside (2011 maps, I think). I got a couple of read errors so I thought I'd buy a genuine disc. I picked up a 2012 Western Europe disc from eBay for £60. Several times today the unit's stopped, screen goes blank for a second and it comes back on again like when the car's first started. Can anyone shed some light please? I think it's a Mk. 1 unit.