on that shelf was a long thin rectangular device of some kind which had a rectangular readout on the front with various bars of colored lights displayed on it -- much like some stereo systems used to have.

How would the previous sentence be correctly capitalized?
Answer: On that shelf was a long thin rectangular device of some kind which had a rectangular readout on the front with various bars of colored lights displayed on it -- much like some stereo systems used to have.
loss of exercise stamina

How would the previous sentence be correctly capitalized?
Answer: Loss of exercise stamina
go 101-... declaration of conformity 245 kb download

How would the previous sentence be correctly capitalized?
Answer: GO 101-... Declaration of Conformity 245 kB Download
the blue colour is designed for use when handling food.

How would the previous sentence be correctly capitalized?
Answer: The blue colour is designed for use when handling food.