A faulty power supply or power control component can lead to any number of intermittent
problems. Some examples include: irregular startup failures, rooting or shutdown during
otherwise normal operation, memory errors (depending on the component being powered),
overheating or even electric shocks.
Some of the more obvious power-related fault symptoms are: complete startup failure (the
system is completely dead and nothing happens when it is turned on), smoke or fire, and
blown fuses or tripped breakers as soon as the power component is turned on.