RobGu

Hello all Hopefully someone can help me with a very odd issue I'm having with my Columbus system in my 12 plate Superb Elegance Estate 4x4. I've read loads on this forum and others but non of the threads seem to be what I'm experiencing. When I start the car, the Columbus system only powers up about 50% of the time. It's not random, so it will go for a week or two powering up fine, but then won't power up at all for a few weeks. When it does power up it's faultless, it has never turned off during the journey and it works fine (CD, radio, Bluetooth, sat nav, I don't use the HDD)). When it doesn't power up, sometime it will turn on during the journey, sometimes not. When it does turn on during the journey it takes a long time to boot - I assume performing some sort of full system reboot. So it's not a simple fuse issue, as then it wouldn't turn on at all (and I've checked the fuse in the main fuse panel and that's fine). It's not some simple loose connection, as then it would sometimes turn off when driving (which it doesn't do). It's not the hard drive failure that people experience when it turns on and then promptly off again. It's not simply 'died' as then it wouldn't work ever. Does anyone have any idea what's going on, or how I can investigate further? Thanks in advance, Rob