A desktop shuts down at random. The case is not hot, and a power-supply tester shows the supply dropping out under load. Which part should be replaced?
Select an answer to reveal the explanation.
Short Explanation
The tester says the supply is falling over, and the case is not cooking. You replace the power supply. A screen, a printer cartridge, and a name server do not fail that tester or pull the desktop down.
Full Explanation
Random shutdowns with a cool case and a tester that shows the supply dropping out point at the power supply, not at heat. Replacing the supply addresses the failed part. The monitor displays a picture. It does not shut the desktop down when a supply tester fails. Toner is a printer consumable. It cannot fail a power-supply test. DNS resolves names. A slow lookup does not power the machine off. Exam caveat: match the replacement wattage and connectors. A supply that tests good and is too small for the load can still drop out. Operational check: install a supply that passes the tester, run the same load, and confirm the desktop stays up. Run the same load on the new supply and confirm the desktop stays up. Match the new supply's connectors and wattage to the desktop. Write the result on the ticket before you close it.