A user reports that their machine will not power up. The technician has already tested the wall outlet and the power cord, which are functioning properly. Which of the following should the technician do NEXT?

A.
Test the machine on a UPS battery backup.

B.
Plug the machine into a different wall outlet.

C.
Check to make sure the motherboard is seated correctly.

D.
Test the machine with a power supply tester.