computer shuts off right after start up.

[ninjapenjuin]

so i built my computer and it was great and all. but it started overheating and it took a while to get a heatsink. i bought a heatsink and installed it and after now it does not turn on for more then a second. i didnt have the money to fix it so i set it to the side and then i brought it out to geek squad after 4-6 months of waiting and it worked fine. there was a fan error. so i fixed the fan error and everything ran great for 24 hours, played games and watched youtube, then after that the problem is back. i dont know what to do and any info or help is much appreciated. i am also writing this from my girlfriends laptop and im not at my house.

specs
MOBO ASUS P8Z77-V DELUXE LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

GPUEVGA 02G-P4-2678-KR GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card

CPU Intel Core i5-3570K Ivy Bridge Quad-Core 3.4GHz

Heatsink Cooler Master Hyper 212 EVO - CPU Cooler

PSU CORSAIR HX Series HX850 850W

HDD WD Caviar Black WDBAAZ0020HNC-NRSN 2TB 7200 RPM

SSD OCZ Vertex 4 VTX4-25SAT3-128G 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD

RAM 2 x CORSAIR Vengeance LP 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model

 

[nullifier]

A few things come to mind:

Have you reset the BIOS by clearing the CMOS?
What type of thermal paste/compound was put on the heatsink and how was it applied?

Thanks!

 

[ninjapenjuin]

yes i have. and cooler master high performance thermal compound. i will reset them again just in case. i applied a small dollop and used the set the heatsink ontop gently so that it would spread out evenly and thoroughly

 

[nullifier]

A few more things to try IF you haven't already that is:

- Check the pins of the CPU and ensure not have been bent/broken and make sure that it is resting in the slot properly
- Perform deductive troubleshooting, start removing components one by one until you're left with only basic components (CPU, Mobo, PSU). I would like to see if you are able to get it past POST or at the very least throw a POST error (beep codes). If only the basic components are installed and there still aren't beeps, that makes me concerned about a short in the mobo. If you do hear the beeps, then consult your mobo's manual to determine the error.
- Speaking of codes, does your mobo have a code readout? Some manufacturers have a 2 digit hexadecimal code readout on the board.

Good luck my friend.

 

[FiL]

i'd try getting it to work on one RAM stick too! I've just had months of instabilities cured by throwing out dead RAM

 

[alexoiu]

I'd try reinstalling the CPU heatsink (clean the old paste, reapply new one) and testing the board outside the case, for ruling out a short.

 

[EpicMeatWad]

Sounds like either Mobo or PSU..maybe CPU?, I had this exact problem, my computer would work just fine and it was overheating due to a stock heat sink, so I replaced it with a new one and arctic silver, tried to boot, nothing the fans would spin and it would shutoff. So I took a shot in the dark and bought a new PSU. I also later used the paperclip method to test my old PSU yep dead... She's running strong now.

 

[nullifier]

Sounds like either Mobo or PSU..maybe CPU?, I had this exact problem, my computer would work just fine and it was overheating due to a stock heat sink, so I replaced it with a new one and arctic silver, tried to boot, nothing the fans would spin and it would shutoff. So I took a shot in the dark and bought a new PSU. I also later used the paperclip method to test my old PSU yep dead... She's running strong now.

The good ole' paperclip method 😀

 

[ninjapenjuin]

So I took everything butthe psu and mobo out and nothing. The fans dont spin and nothing starts up. I use the power button on the mobo and it stays lit when I have the power switch in the on position. There are no beeps. Is this most likely a mobo problem? What are suggestions?

 

[ninjapenjuin]

I also just did the paper clip test and the fan on my power supply did not spin.

 

[EpicMeatWad]

I also just did the paper clip test and the fan on my power supply did not spin.

That sounds like textbook bad PSU, I would RMA that..Or get it tested at a computer shop.

 

[EpicMeatWad]

Also Geeksquad is useless, my grandmother knows more about computers than them...

 

[nullifier]

I also just did the paper clip test and the fan on my power supply did not spin.

Yup, looks like a bad PSU my friend. I would look into RMAing the one you have If under warranty) or buying a new one.

Take care.