OrangeRKN wrote:So I turned my Switch on earlier to be greeted with this:

A vertical line of discolouration that had visible scan lines and seemed to have a fixed wave in intensity. Visible everywhere, but much more apparent against a dark background, and it doesn't show up in screenshots or when docked so is definitely a screen issue.
After maybe an hour of playing it faded and seems to have disappeared.
1) What the hell
2) Should I be worried
3 possibilities most likely:
stressed screen to display chip ribbon cable
twisted LCD causing discolouration in one place
Too much current across that part of the LCD matrix for some reason cause by some faulty capacitor
All of them can just go away, if it becomes permanently it might just need re-assembly or one or two SMD components resoldering/replacing, it seems unlikely to result in a total part failure liek screeen, backlight or invertor (all of which aren't that expensive to fix anyway).
As always with these sort of things I bet 90% on a single faulty capacitor on a cheap assembly line because consumer electronics. One and only reason my Macbook Pro is unsuable without extensive software hacks, so it doesn't matter how much you pay. Sometimes the tiniest things have the most obvious compound effects.
Nintendo would probably charge some stupid amount to replace a whole part so get it too a reputable send away fixer because Switch has been out well long enough for plenty of teardowns and third party / oem replacements to be offered successfully.
Of course although these things are meant to be free from interference and producing interference that is basically bollocks and it could be caused by all kinds of things from a microwave to mobile phone to a satellite to aliens and never happen again.
Alternatively get shot of it and re-up with another one lol. Must be said I've only ever broken my own Nintendo devices but Switch does not seem to have had quite the same luck.