I was faced with a blue screen just displaying “lubuntu” centre bottom of screen - no mouse response to touch pad, no response to any keys except power off.
I tried powering off and on again with shift to get to GRUB . That worked but none of the grub options got me back to a bootable machine. I took the noob’s way out and reinstalled lububtu from a USB stick.
Back to normal now but I’d like to know what happened so i can avoid it happening again. Should I avoid using Muon? Any suggestions for a noob friendly article or tutorial on using grub recovery tools?