an examination to discover and repair faults

redo, restore

to state (something) again

start over; refurbish

(of an engine, machine) repaired and put into a good condition again

renew

to make (a room, furniture etc) clean or bright again, (as if) new

spruce up

to cause (a person) to feel young or active again

make new again

to begin (something) again; to put new life and strength into (something); to replace (something out of date)

start over; refurbish

to restore (an old building, painting etc) to a good condition

fix up, modernize

to put fresh supplies into or onto (something)

start over; refurbish

to improve the condition of (something)

renovate

(to cause oneself, a person) to become smart

fix