Computer crashed wont turn back on. Help!

[NanoBlade]

So my problem is that my PC that I built at the end of November last year just crashed randomly while I was just browsing internet doing my own thing. I have no idea what the heck caused it it just turned off and won't turn on anymore.

When I try to rurn it on only the fans turn on for a split second and nothing else happens though my motherboard rgb lights and my keyboard backlight turn on when its plugged in. Also I can do the fan test with my Corsair rm750i PSU.

Pls help I've got no Idea what to try right now.

My system specs:

CPU: Intel Skylake I5 6600k @ 3.5GHz

Motherboard: Asus Maximus VIII Hero

Ram: Corsair Vengeance LPX 2666MHz @ stock speed

GPU: Sapphire Nitro R9 390 @ stock speed

PSU: Corsair RM750i

If you need any more info just ask.

Thx everyone in advance.

[Codymm03]

Dead motherboard or powersupply

[hug0mac]

So my problem is that my PC that I built at the end of November last year just crashed randomly while I was just browsing internet doing my own thing. I have no idea what the heck caused it it just turned off and won't turn on anymore.

When I try to rurn it on only the fans turn on for a split second and nothing else happens though my motherboard rgb lights and my keyboard backlight turn on when its plugged in. Also I can do the fan test with my Corsair rm750i PSU.

Pls help I've got no Idea what to try right now.

My system specs:

CPU: Intel Skylake I5 6600k @ 3.5GHz

Motherboard: Asus Maximus VIII Hero

Ram: Corsair Vengeance LPX 2666MHz @ stock speed

GPU: Sapphire Nitro R9 390 @ stock speed

PSU: Corsair RM750i

If you need any more info just ask.

Thx everyone in advance.

 

try using the built in "gpu" of intel, if nothing happens, try if your hard drive works in another system if you can, more than that... try to clear cmos or rest the bios by...well you got a switch for that oin the Maximus VIII i believe.

 

hope this helps a bit 

[2001jaden]

If it is the motherboard, you would probably be able to get it replaced under warranty

[NanoBlade]

Update: When I tried to turn it on just a minute ago it started turning fans on every 1 sec and back of again.

[NanoBlade]

try using the built in "gpu" of intel, if nothing happens, try if your hard drive works in another system if you can, more than that... try to clear cmos or rest the bios by...well you got a switch for that oin the Maximus VIII i believe.

 

hope this helps a bit 

Using the built in one does not seem to do anything should I unplug the R9? Pushing the reset cmos only spins the fans around for a split second.

Can't try my hard drives anywhere else its the only desktop in the house.

[hug0mac]

Using the built in one does not seem to do anything should I unplug the R9? Pushing the reset cmos only spins the fans around for a split second.

Can't try my hard drives anywhere else its the only desktop in the house.

 

probably the power supply..., as the fans spin, you get power (from somewhere, the psu) but it dont "hold it" and just goes off again. its weird to see the RMi (maybe) fail as that.

 

i dont think its the motherboard...dont you got any error code thing on the Maximus VIII?

[Lazmarr]

probably the power supply..., as the fans spin, you get power (from somewhere, the psu) but it dont "hold it" and just goes off again. its weird to see the RMi (maybe) fail as that.

 

i dont think its the motherboard...dont you got any error code thing on the Maximus VIII?

I don't think it is the PSU as it would not be able to provide or hold power if it had gone.

[NanoBlade]

Here are 2 videos to show what happens when I try to turn it on and when I press clear cmos:

In low res:https://youtu.be/PItM-emNFM8

In 4k:https://youtu.be/KRit8h8YQFQ

I removwd the GPU and switched it to the integrated processor gpu.

[pedro69]

You can try the following:

1. Take out your RAM, unplug the PSU from the wall and hold down the power button down for about 20 seconds.
2. Put the RAM back in, reconnect the power and check if it turns on now.

If this doesn't work it's time to start swapping components and I would start with the PSU. If the PSU works it's most probably the Mobo (check for bulged capacitors).

[NanoBlade]

You can try the following:

• Take out your RAM, unplug the PSU from the wall and hold down the power button down for about 20 seconds.
• Put the RAM back in, reconnect the power and check if it turns on now.

If this doesn't work it's time to start swapping components and I would start with the PSU. If the PSU works it's most probably the Mobo (check for bulged capacitors).

It did not work guess I will start with switching out the components so should I replace the PSU first?

[pedro69]

It did not work guess I will start with switching out the components so should I replace the PSU first?

If you don't see any visible issues with the Mobo (i.e. bulged capacitors) I would start with the PSU. You can do a basic test by shorting the black and green connector on the 24 pin:

 

To do a basic test disconnect everything from the PSU, put a paper clip in the two connectors (see photo) and flip on the power switch in the back of the PSU. Check if the fan turns on on the PSU, but please be aware that some PSU have 0 rpm when on idle so you might need something else connected to see if it gets stable power (i.e. connect a fan to a molex connector on the PSU).

[NanoBlade]

If you don't see any visible issues with the Mobo (i.e. bulged capacitors) I would start with the PSU. You can do a basic test by shorting the black and green connector on the 24 pin:

To do a basic test disconnect everything from the PSU, put a paper clip in the two connectors (see photo) and flip on the power switch in the back of the PSU. Check if the fan turns on on the PSU, but please be aware that some PSU have 0 rpm when on idle so you might need something else connected to see if it gets stable power (i.e. connect a fan to a molex connector on the PSU).

The PSU has a fan test button on it which spins the fan in it. Or should I use your method?

When I press the fan test then the fan spins.

[pedro69]

The PSU has a fan test button on it which spins the fan in it. Or should I use your method?

When I press the fan test then the fan spins.

I would use my method because with that you can be sure it will test the PSU and not only the fan. Just be careful to not short the wrong pins.

 

Your PSU is definitely 0 rpm on idle so if you have a fan with a molex connector I would hook it up to see if it gets stable power.

[NanoBlade]

I would use my method because with that you can be sure it will test the PSU and not only the fan. Just be careful to not short the wrong pins.

 

Your PSU is definitely 0 rpm on idle so if you have a fan with a molex connector I would hook it up to see if it gets stable power.

Unfortunately I don't own a fan with a molex connector and I am not sure which pin is wich because all my cables are black.

[pedro69]

You can also go by location of the pins (compare with photo). Make sure the connector has the same orientation and bridge the pins to the left of the latch.

 

To check you can also use a Multi-meter if you have one, check on a molex connector - either black & yellow (12V) or black & red (5V).

[NanoBlade]

You can also go by location of the pins (compare with photo). Make sure the connector has the same orientation and bridge the pins to the left of the latch.

 

To check you can also use a Multi-meter if you have one, check on a molex connector - either black & yellow (12V) or black & red (5V).

Okay I tried your method and got about 0.75 V on the Multi- meter on the 20V setting.

Thats not normal is it?

[Brennan Price]

Have you moved your Power switch or leds or anything whilst it was on? It could have shorted out yur MB and stuff. Try moving the cables around

[pedro69]

Okay I tried your method and got about 0.75 V on the Multi- meter on the 20V setting.

Thats not normal is it?

Here is a diagram of a molex connector:

 

When measuring at the black (negative) and yellow (positive) pins you should get a relatively stable 12 Volts reading on the multi meter. 0.75V is way to low and might indicate your PSU went south.

 

If you have the chance to test your rig with another PSU (friend or family for example) I would recommend it before buying a new one though.

[NanoBlade]

Have you moved your Power switch or leds or anything whilst it was on? It could have shorted out yur MB and stuff. Try moving the cables around

Well there was that one time that my computer froze and I didn't know what to do so I turned the Psu off. I'd say about 2 days ago

[Guest]

Well there was that one time that my computer froze and I didn't know what to do so I turned the Psu off. I'd say about 2 days ago

On my Asus motherboard that happens when I don't hold down the power for 3 seconds (either the case button or on board button)

[NanoBlade]

Okay Im pretty sure that my power supply is bust because when I tried the hard drive method I got no response from it.

Hope it didn't take anything else with it.

[PCBEGINNER]

Well there was that one time that my computer froze and I didn't know what to do so I turned the Psu off. I'd say about 2 days ago

^this, first the problem was the motherboard now the power supply.. if your computer froze, press down hold it the power button on your case TILL it shuts off.. NEVER EVER EVER EVER EVER EVER turn off the psu when the computer is on NEVER EVER EVER dont ever do it again.. your pc needs time to shutdown.. 

i have the same problem but for me its because there was a power outage in my area, turns off my psu, first it works for like a day or two and then suddenly computer wont turn on again, bought the psu tester and motherboard tester then on the psu tester not all the light turns on, bought a new psu and now works well 

[NanoBlade]

^this, first the problem was the motherboard now the power supply.. if your computer froze, press down hold it the power button on your case TILL it shuts off.. NEVER EVER EVER EVER EVER EVER turn off the psu when the computer is on NEVER EVER EVER dont ever do it again.. your pc needs time to shutdown.. 

i have the same problem but for me its because there was a power outage in my area, turns off my psu, first it works for like a day or two and then suddenly computer wont turn on again, bought the psu tester and motherboard tester then on the psu tester not all the light turns on, bought a new psu and now works well

Guess the same(or something similiar) happened to me but at my own fault.

[PCBEGINNER]

Guess the same(or something similiar) happened to me but at my own fault.

well it might not be the psu, get the psu tester (and motherboard tester they both are different thing) if you can from ebay, amazon or your local tech/pc component shops to test your psu or motherboard if its good or bad dont worry the tester will come with the instruction so you will know what it says/means what each lights represents when its on or off on the tester! hope it helps!