I had similar issues, but with a DVI input on a monitor.
For me at least the rainbow screen was showing sometimes, but often also not.
After tons of different settings in config.txt (which didn’t solve the issue) and different hdmi-dvi cables, I ended up reinstalling Raspbian. After that I got the screen working again.
The only thing is that there is no red color on my monitor. Tried different power supplies, cables and certain settings in config.txt, none of them fixed my red color missing issue.
But that is another story…

Give it a shut to reinstall. Don’ t forget to save data as reinstall is wiping the sd card.

Why a laptop, instead of a RPi?
More heavy (need stronger frame),
More noise (from laptop fans)
More power consumption ($$$),
More heat => need proper ventilation,
Windows => I guess you cannot use the MM framework

Hi Serge,

I am also in the same struggle: Acrylic or glass for a bathroom.

I’ve read the article you have linked, but it is not mentioning exact sizes. Just small, medium and large. But yeah, define ‘medium’…
Where does this 600x600mm as max size for acrylic came from, if I may ask?

On top of this, this example is about a 1000x700mm mirror where acrylic was used. Not for bathroom, true, and you can see some distortion at the places where the mirror is attached to the frame. But I don’t see any issues with the edges, which, regarding the article, should be a problem for the acrylic.

So to summarize, I think I will got for a 500x700 borderless acrylic for my bathroom, as my first MM.