Computer shut down for no reason

[DRJ1014]

My computer has been on for about 5 days no restart no shutdown. today i bought a fridge and plugged it into the wall socket across the room. i went down to watch the lord of the rings and after it was over i came back up and found my computer off and my monitor off. when my monitor goes into hibranation the light flashes on it. the light was off so i know somthing turned it off. what could of caused this? am i overloading the electrical in my room? what can i do to fix it?

 

[Ice Czar]

this would be illustrative > http://www.silentpcreview.com/article166-page2.html

As the voltage is reduced, the PSU has to draw more current (Amps) in order to maintain the output voltages. The actual power drawn by the PSU rises when the input voltage is reduced. This is why, for example, that a power supply rated for 120VAC, 5A might be rated for 240VAC, 3A. Maintaining steady output voltage lines becomes much harder with lower or varying AC voltage. This is how PSU voltage regulation can be really tested.

The PSU was placed in the thermal test rig, with 120VAC power delivered by the CI-801RP. Each PSU was warmed up for a few minutes at 120W, then set to deliver full power. Internal test box temps were ~37°C. AC measurements were made with the Kill-a-Watt AC power meter. Voltmeters were used to continuously monitor the 12V, 5V and 3.3V output lines. The VAC was then reduced from the standard 120VAC down to 80VAC. This is a very demanding test, as the Seasonic PSUs are rated for full power output with 100-240VAC.

Note that the output voltage remains constant through these dramatic drops in AC input voltage — and the associated increases in the current and power drawn by the PSU.

The same test was conducted at 300W output on two other SPCR-reviewed PSUs that will remain unnamed at this time: One rated at 350W sparked and shut down within 15 seconds of running at 90VAC. It appears to be dead. The latter, rated at 380W, auto-shutdown safely within seconds of 100VAC operation. It appears to consider operation at any AC voltage under ~103W to be unsafe

then consider
"I plugged in a refrigerator"