Turn on then shut off

[garrettstocke]

My PC is almost completely new and I travel with it to and from college. I just arrived back from winter break and I plugged everything in and she turned on then off, I thought it maybe was from the travel so I left it sit for a bit and tried again and it turend on for a while, then i shut it down again, I went to play later and the same thing happened, it was turned on for about 15 minutes then she shut down. Not even 5 months ago a new MB, PSU,GPU and RAM were all put in! I am freaking out here! I dont want to drop another 500 bucks! Any help??, thank you!!

[skidawgz]

start simple...
Go thru and unplug, replug all connections from PSU to each component it is connected to.
Unseat then reseat devices like your RAM, Vid card... etc.. (NOT the CPU haha).
start with that, you don't need a new computer, calm down.

[garrettstocke]

okay i did that and same thing!

[skidawgz]

so what is it doing then when it shuts down? BSOD? Beeps then off? turns right off no errors?
Can you get into bios to see if a system error shut it down? such as overheating?

[Zerk]

If you have a switch on the back of the power supply make sure its set to the right volts. Make sure their no wires or motherboard shorted to the case, check power switch ( this can be unpluged and cut on by jumping the pins on the MB)
Besides the volt switch on the back of the power supply I would say bad power supply switch it out with a old one or a friends (if the donor PSU is underpowered remove the video card before trying it.0

[garrettstocke]

It will just shut completely off, no erros or anything. Now I turned it on and it shut right off, then flipped the switch in the back of the PSU, off then on, it ran fine for hours no problem, then i just it down manually.

[skidawgz]

im starting to suspect the PSU. If you have a spare you can hook up to check, do so. Ask a friend or fam.
If not find out about warranty on PSU.

[Edward M. Grant]

True. We had a computer doing this at work last week, and replacing the power supply solved it.

Sudden shutdown is normally either an overheating or PSU problem.

[garrettstocke]

Thats what i suspected too! I took my PC in to get it checked a while back and the guy told me..(among other problems)..my PSU was out and he replaced it with the same wattage, i didnt think of much it until i check and he threw in a 300 watt PSU and i had a 350 watt psu in there before!

- - - Updated - - -

True. We had a computer doing this at work last week, and replacing the power supply solved it.

Sudden shutdown is normally either an overheating or PSU problem.

okay, i will look more into it, thank you!

[Edward M. Grant]

In theory only a high-end gaming system should need more than 300W (e.g the component power usage in my i7/GTX 660 PC only total to about 280W), but it depends on how much power is available on the different voltage rails so people tend to go for larger ones to ensure they have enough.