If I boot up my computer, I get a screen which looks like this
(The pixels look like they are changing rapidly, they have a white/blue colour).
If I hold down the power button as soon as this screen appears, nothing happens. However, if I wait perhaps 15 seconds, and then hold the power button, the computer turns off.
Usually the next boot is completely normal. I see the MSI logo and then boot into Windows 10.
The other thing to note is that yesterday, the 'MSI gaming' splash screen which appears on boot did not appear correctly - it had white streaks through part of it.
I have recently installed Cygwin, and wondered if the problem could be related to that - but it looks more like a hardware issue, probably motherboard related? (I don't have a graphics card - the HDMI cable goes into the motherboard.) Has anyone any experience of something like this?