Basically as the title says. I've had this car since April, and this issue would occasionally happen while driving, but never repeatedly. But, since last week, the Columbus head unit has just not worked properly and is turning off and on repeatedly, often with an accompanying electrical popping noise (like when you plug an aux cable from a hi-fi amp into a laptop). This popping noise actually happens even when the car is off, but unlocked. Here is a link to a video of the issue that I filmed this morning. Any advice on repair would be massively appreciated, as I'm trying to avoid a replacement unit due to loving this one (and I reckon the volume controls etc on the steering wheel might not work with a replacement, although I'm not technically savvy so I could be wrong)