Fujitsu ESPRIMO Q55x Operating Manual page 25

Vertical with no base, ON/OFF switch facing upwards
If you are not using a base, you will need to affix the adhesive feet you were
supplied with to the four corners of the left side of the device (side with screw holes
for attaching the base). Affix the adhesive feet in such a way that no fan vents are
covered (see Section
Operation in the vertical operating position is not allowed in Taiwan.
Fujitsu
"Attaching the adhesive feet (optional)", Page
Getting started
23).
21