Boots to black screen with grub> but can only get exit to work AFTER many attempts - Ask Ubuntu


i think saw before, can't find again. new ubunut. have toshiba satellite w/12 gb ram, windows 10 , 500gb hdd. installed 16.04 while , worked fine while. suddenly, when start laptop, doesn't boot way selection page - i.e. - ubuntu, efi, uefi, etc. shows on screen is: gnu brub version 2.02~beta2-36ubuntu3.2

minimal bash-like line editing supported. first word, tab lists possible command completions. anywhere else tab lists possible device or file completions.

grub>

when try scrolls past fast miss @ least half of list. how stop/pause scrolling read in listing? how load kernal or grub system booted option screen? far, thing have been able try "exit" until boots windows. how option screen , keep there? have tried read on , know if there guide walk newbie through maize of different commands , verbage. different normal windows stuff, reminds me of ms-dos yet more different seems. help.

it seems /boot/ partition corrupt. try reinstall grub livecd using command: grub-install example: grub-install /dev/sda


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