Sometimes my RPi screen is very dark. Not black but very dark.
It happened yesterday and thinking it was the controls on the monitor I tried brightness, contrast but nothing helped. So I rebooted and everything was fine.
Today the screen was dark and I had to reboot twice because the first attempt came up dark again.
Tonight I can't get the screen back to normal no matter how many times I reboot or shutdown and restart.
The screen is dark from the very beginning. The rainbow screen is dark but visible. Same for that screen with the raspberry image. When the dump listing all the startup stuff scrolls it is barely visible.
After the desktop appears just that bright sun part of the image is visible. The rest is very faint. I can see the task bar and if I can guess at the cursor position and open the file explorer, then I can read the folder and file names on the white background but that is about all.
Any ideas what i should do?