A corporate workstation has been suffering frequent power supply unit (PSU) failures. After reviewing the setup, a technician notes that the workstations are connected to a 220-240 VAC outlet, but the PSUs are configured manually for a 110-120 VAC input. What should the technician do to correct this issue and prevent future PSU failures?
Switch the PSU voltage input selector to 220-240 VAC.
Install an automatic voltage regulator for each workstation.
Check the wattage rating on the power supply units.
Ensure there is proper ventilation around the power supply units.