If you see something like:

°±⎼␊⎻: ␌▒┼’├ ⎺⎻␊┼ .┐␍␊/␌▒␌␤␊-│␊⎺┼
│␊⎺┼# ─
┐⎽␤: ─: ┼⎺├ °⎺┤┼␍
│␊⎺┼#
│␊⎺┼#
│␊⎺┼# ├⎻┤├ ⎽±⎼

instead of normal ASCII text, run the following command (blindly)

tput sgr