1) Check for loose screws and
connectors.
2) Are there any abnormal odors or
discoloration?
3) Are there any cracks, damage,
deformation, or significant rust?
4) Is there any electrolyte leakage or
signs of deformation in the
capacitors?
1) Check for catching or abnormal
vibration.
2) Is there any bolt looseness?
3) Is there any discoloration due to
overheating?
Is there any cooling fin, air intake, or
exhaust port clogging or foreign material
adhesion?