Update Causes Screen Flashing

[clintbradford]

After several months of non-use, I fired up my Pi 3 with its Sense HAT, and all was perfect. Ran a couple programs, all was well. Then I entered Terminal, and carefully entered the three commonly-published "updating" commandlines. All loaded well, I was asked once if it was OK to use up some more card space - all went fine. When completed, I exited Terminal, and noticed that my background screen was not the photo I has before, but didn't think much of it. I shut down using the drop-down menu's "Shut Down" command. I waited more than five minutes before unplugging.

Today, I power it ip. The four Raspberries quickly appear in the upper left, but all the screen does not is quickly flash. No chance to enter any commands.

Plugged in my second Pi 3 using same HDMI cable and power supply, and it is fine.

SO - Did I somehow corrupt my main memory card? Do you have any hints as to what to do now? Please believe me, I am embarrassed enough to next learn how to make a complete backup of my card - once it is back up and running.

Clint Bradford

[Imperf3kt]

What "three" updating lines did you use? Only two are ever advised

sudo apt-get update
Followed by
sudo apt-get upgrade


As to fixing things, is there anything on the card you want? Pop it in an sd reader or some such and copy the files off it, then simply reflash your operating system onto it via either etcher or the SD card foundation's tool.

[clintbradford]

sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install -y pprompt

Thank you for the information ...

Clint Bradford