Gary called from Branford because his desktop computer would not turn on at all. There were no lights, no fans, and no sign of power. He had already spoken with customer service, who suggested that the power supply might have failed, but the terminology was confusing and he initially bought a replacement power cord instead.

He told me the computer had briefly started for about two minutes before dying again. When I arrived, it was completely dead. Based on the symptoms, I agreed that the internal power supply was the most likely failure. Gary was comfortable enough with computers to review a replacement with me, so we selected one that would work with his system and he ordered it.

I returned the next day, removed the failed power supply, installed the replacement, and reconnected the computer. With the new power supply in place, the desktop powered up and was working again.

This is a good example of why a computer that appears completely dead does not always mean the whole machine has failed. The power cord is only the cable that brings electricity to the computer. The power supply inside the case converts that electricity and distributes it to the motherboard, drives, and other components. When that internal unit fails, replacing it can bring an otherwise usable computer right back to life.

Related service: Computer Repairs & Upgrades.