Computer Won't Turn On

[InfinityHardware]

I recently built my friend a computer and it has worked fine for about a month. He uses it to play games mostly and just browse the internet. Recently it has been turing off randomly and now it will not turn back on. Does anyone know what could be causing it? I know there are a lot of things but what are the main causes?

Just for reference, his mouses LEDs still light up but not his power LED and no fans or HDD spin up. He has tried changing outlets also.

Specs:

Intel i5-3570K (Not Overclocked)

MSI Z77 G-43 Motherboard

8 GB Kingston Hyper-X 1600MHz RAM

PNY Nvidia GTX 670 (Very Slightly Overclocked)

WD 1 TB Black HDD

Corsair TX 650 Watt PSU

[SimplySteam]

From my knowledge, the only thing I can think of right now is if the computer beeps, you could always find out what the beep codes mean for that board.

[Glaith]

Power supply by the sounds of it.

[Glaith]

Power supply by the sounds of it.

Those pc specs are power hungry you may have blown the PSU

[fishymamba]

Not with a 650 Watt PSU. You could probably run a stock 3570K and 670 using a 550W PSU.

[SimplySteam]

Fishymamba is correct, those components are really not that power hungry even with a modest overclock. If you have a spare power supply you could switch them out but since there is power going through the board it would seem, it seems fine.

[perplex]

make sure your 24 pin is plugged in the full way.. also check the other power cables are all in correct,

dont just look at it and think its in, unplug and put back in and look to see if its in :)

[bradscoolio]

Power supply by the sounds of it.

not on a 650w. he'll be pulling max 400w at the highest possible load, probably closer to 350w

[bradscoolio]

do a once over the power connectors to make sure they're all plugged in correctly and haven't fallen out.

try to boot it with one memory stick at a time moving channels to see if maybe the memory or channel is dead, with that you'll be able to see which one is defective.

if none of those work try testing his psu with this method:

(universal for all psu's, not just corsair)

​i'd do the psu test first to avoid having to boot the system many times with a defective psu :)

Pease get back to us with results

[InfinityHardware]

make sure your 24 pin is plugged in the full way.. also check the other power cables are all in correct,

dont just look at it and think its in, unplug and put back in and look to see if its in :)

He has checked the 24 pin and made sure it was in already.

[InfinityHardware]

do a once over the power connectors to make sure they're all plugged in correctly and haven't fallen out.

try to boot it with one memory stick at a time moving channels to see if maybe the memory or channel is dead, with that you'll be able to see which one is defective.

if none of those work try testing his psu with this method:

(universal for all psu's, not just corsair)

​i'd do the psu test first to avoid having to boot the system many times with a defective psu :)

Pease get back to us with results

Would bad RAM stop it from even spinning up fans?

[glutesontheloose]

I suspect its a PSU problem. May not be the PSU itself but the Cables.

[Blake]

does sound like a PSU issue, actually sounds alot like a voltage issue, but while what you can do is just pull the CMOS battery (unit unplugged of course) and let the bios reset (check the mobo manual it will tell you the easiest way to do this). While you are also at it, unplug all ram and only have one stick in the first slot.

Also I hope you put in the PC Speaker that usually comes with the case or mobo

[InfinityHardware]

does sound like a PSU issue, actually sounds alot like a voltage issue, but while what you can do is just pull the CMOS battery (unit unplugged of course) and let the bios reset (check the mobo manual it will tell you the easiest way to do this). While you are also at it, unplug all ram and only have one stick in the first slot.

Also I hope you put in the PC Speaker that usually comes with the case or mobo

What PC Speaker?

[SimplySteam]

does sound like a PSU issue, actually sounds alot like a voltage issue, but while what you can do is just pull the CMOS battery (unit unplugged of course) and let the bios reset (check the mobo manual it will tell you the easiest way to do this). While you are also at it, unplug all ram and only have one stick in the first slot.

Also I hope you put in the PC Speaker that usually comes with the case or mobo

He means the beeper that beeps code if there is something wrong and beeps once when the computer is turned on

[InfinityHardware]

does sound like a PSU issue, actually sounds alot like a voltage issue, but while what you can do is just pull the CMOS battery (unit unplugged of course) and let the bios reset (check the mobo manual it will tell you the easiest way to do this). While you are also at it, unplug all ram and only have one stick in the first slot.

Also I hope you put in the PC Speaker that usually comes with the case or mobo

So it isn't pre-installed on the board? And if not where would it be?

[SimplySteam]

does sound like a PSU issue, actually sounds alot like a voltage issue, but while what you can do is just pull the CMOS battery (unit unplugged of course) and let the bios reset (check the mobo manual it will tell you the easiest way to do this). While you are also at it, unplug all ram and only have one stick in the first slot.

Also I hope you put in the PC Speaker that usually comes with the case or mobo

It would be in a little bag with some other little parts for the motherboard

[RobertVanGilder]

Something to do with the PSU or the MOBO or even the BIOS...

[LogicalDrm]

Just for test swich your psu to his case. Just to test if systems will power on.

[InfinityHardware]

does sound like a PSU issue, actually sounds alot like a voltage issue, but while what you can do is just pull the CMOS battery (unit unplugged of course) and let the bios reset (check the mobo manual it will tell you the easiest way to do this). While you are also at it, unplug all ram and only have one stick in the first slot.

Also I hope you put in the PC Speaker that usually comes with the case or mobo

The only thing that came with the motherboard was something called M Connectors and I'm not sure what they are for but it looks like the are supposed to go on top of the power LED switch area. They are labeled on the side so I think they are just to help know what goes where. Other than that I have a Manual and a quick install guide.

[InfinityHardware]

When you boot up do you get a bios picture? If not your motherboard or processor may have just been defective and crashed. This happened and I replaced my Intel Core i3 540 and motherboard for a new Intel Core i5 3570k and motherboard. Everything worked fine after that. I had the exact same scenario.

The monitor doesn't even detect a source.

[Tr3vor]

Reseat everything, ram, power, SATA, etc., except the CPU.

You can check your Power Supply by shorting the wires between the green cord and any black cord on the 24 pin power cable to tun the psu on, then use a multimeter.

Make sure there are standoffs behind the motherboard, it may be insulting to some to suggest this, but just to be sure....

[Puppet]

This is a bit of an outside chance but check all front panel connections all the way to the switches. I had this issue a few years back were the on switch was shorting out and causing my computer just to shut down randomly, took me about a week to figure out lol

Have you tried powering up the PC by shorting the pins on the board?

[InfinityHardware]

This is a bit of an outside chance but check all front panel connections all the way to the switches. I had this issue a few years back were the on switch was shorting out and causing my computer just to shut down randomly, took me about a week to figure out lol

Have you tried powering up the PC by shorting the pins on the board?

I haven't tried powering it that way, how would I do that?

[Puppet]

This is a bit of an outside chance but check all front panel connections all the way to the switches. I had this issue a few years back were the on switch was shorting out and causing my computer just to shut down randomly, took me about a week to figure out lol

Have you tried powering up the PC by shorting the pins on the board?

Follow the two wires for the on/off switch and touch the two pins on the mobo that they plug into with a key or something metal