I installed the latest Raspbian on an SD card using Imager. The first boot: everything OK. Updates, installs, rebooting: worked perfectly fine.
However, after shutdown, the screen is blank. After connecting the power cable red light is on, green light goes on, then blinking, then off -- I am guessing it is loading from the SD card. But the screen is dead, it doesn't even show that anything is connected.
I do use HDMI-VGA adapter, so would've loved to test on pure HDMI connection but currently cannot do it (COVID-19, lockdown). Power supply: 2.5 A. There were neither rainbow nor red squares prior to shutdown.
The same problem happened when I installed Raspbian light, but I thought maybe I did something wrong with configs, so tried with the full Raspbian.
It seems the same problem was reported here, but with no answer.