I installed the second linux distro along with Ubuntu, something went wrong, it was to choosing a wrong nvidia driver, and I decided to remove that distro completely by deleting the partition and creating it again (I'll persist installing it) from Ubuntu. However, I had (after the installation the 2nd distro) and am having (after I've removed it) an issue:
during boot there 2 beeps and the label "Fan error" on the black screen before the boot menu appears. It does boot well (Ubuntu) but that error slows down the boot and it generally not normal. I tried boot-repair but the error has remained up til now.
I'm on x64 system and UEFI.