New PC - Not Turning On; Mobo Lights On

Asus P8z68-v pro motherboard
September 4, 2011 at 08:25:35
Specs: Windows 7, Intel Core i7-2600K Sandy Bridge 3.4GHz
I just built my first PC yesterday... And it still hasn't turned on.
The thing is, the power (red) and reset (green) lights on the mobo turn on when I turn the power on on the PSU. However, when I try to turn on the actual computer, and press the button on the front of the case, nothing happens!
The fan on my PSU is not turning on, although it is obviously still providing the mobo with power. Does this mean my PSU is broken?
I am fairly certain I have all the power switches and such in the correct place; I triple checked!

Thanks!


See More: New PC - Not Turning On; Mobo Lights On

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#1
September 4, 2011 at 09:37:10
Make certain that you have all necessary connectors from the power supply and the computer's case connected to the mboard in the right places - READ THE MBOARD's MANUAL - and if you have a graphics card installed in a mboard slot, if it has one or two sockets on it for additional power, that those sockets have an appropriate connector from the power supply plugged into it / them.
(DO NOT use a one to two of the same type of connectors Y cable adapter e.g. a female PCI-E 6 pin connector to two male PCI-E 6 pin connectors - to connect to two PCI-E 6 pin sockets on the card if your power supply does not have enough 6 pin PCI-E connectors. Use a molex to PCI-E Y cable instead (two female molex connectors to one male PCI-E 6 pin connector) for the second socket.)

If that doesn't help, tell us
- the make and model of the mboard
- if you are using a graphics card installed in a slot, the make and model of that
- the (max output) wattage capacity of the power supply
- the brand and manufacturer's part number(s) of the ram module(s) you're using
- the cpu you're using and preferably it's manufacturer's part number
.........

A common problem .....

Your computer may not boot properly if the power supply does not have enough capacity to support the current (amperage) requirements of the video chipset on a card installed in a slot.

In some cases you may have this problem ....

If your mboard has a video adapter built into the mboard, some main chipsets support Hybrid video, and in that case, if you install a video card in a slot that has a video chipset is not supported by the Hybrid video feature, usually due to default bios setiings, the video adapter built into the mboard is NOT disabled when the card is in the slot, and the card produces no video - you need to change default bios settings to get video from the card in the slot.


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#2
September 4, 2011 at 09:54:23
Update:

I have been trying various combinations of things to eliminate variables.
Most salient was that I actually got one of the case's fans and the heat sink to both move for a fraction of a second. I'm not 100% what it was exactly that I did that did this. I tried the four possible different combinations of the on and off positions of the EPU and TPU switches, and it seems that this may have been why. However, I am more leaning toward the fact that these fans seemed to have briefly flickered on when I turned off the PSU, unplugged the IEC, plugged it back in, and turned the PSU on once more. I also tried using a different IEC cable, and when I turned on the PSU, I believe one of the case fans moved by a very small amount.
Still, however, the PSU's fans has never moved. Doesn't this mean that the PSU is dead? When I turn on the PSU, shouldn't the fan turn on, regardless of the mobo and the other parts?


Thanks!


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#3
September 4, 2011 at 10:18:51
"Make certain that you have all necessary connectors from the power supply and the computer's case connected to the mboard in the right places - READ THE MBOARD's MANUAL"

I am fairly certain I have all the power switches and such in the correct place. As I said, I triple checked, and went through the manual rather meticulously.

"and if you have a graphics card installed in a mboard slot, if it has one or two sockets on it for additional power, that those sockets have an appropriate connector from the power supply plugged into it / them."

The GPU is connected to PSU via a 6-pin.

"(DO NOT use a one to two of the same type of connectors Y cable adapter e.g. a female PCI-E 6 pin connector to two male PCI-E 6 pin connectors - to connect to two PCI-E 6 pin sockets on the card if your power supply does not have enough 6 pin PCI-E connectors. Use a molex to PCI-E Y cable instead (two female molex connectors to one male PCI-E 6 pin connector) for the second socket.)"

My PSU does have enough. I'm not even using all of them.

"If that doesn't help, tell us
- the make and model of the mboard

ASUS P8Z68-V Pro

- if you are using a graphics card installed in a slot, the make and model of that

NVidia Quadro FX4600

- the (max output) wattage capacity of the power supply

750 W PC Power & Cooling Silencer Mk II

- the brand and manufacturer's part number(s) of the ram module(s) you're using

G.Skill F3-12800CL9T (4 x 4 GB (I tried turning it on with just one stick in, and with all four sticks in))

- the cpu you're using and preferably it's manufacturer's part number

Intel i7-2600K, 3.40 GHz, 8MB cache, LGA1155


.........

"A common problem .....

Your computer may not boot properly if the power supply does not have enough capacity to support the current (amperage) requirements of the video chipset on a card installed in a slot."

NVidia recommends 750W for my card, which is what I have.
(Source: http://forums.nvidia.com/index.php?...
I read it somewhere else too, but can't remember where.)


"In some cases you may have this problem ....

If your mboard has a video adapter built into the mboard, some main chipsets support Hybrid video, and in that case, if you install a video card in a slot that has a video chipset is not supported by the Hybrid video feature, usually due to default bios setiings, the video adapter built into the mboard is NOT disabled when the card is in the slot, and the card produces no video - you need to change default bios settings to get video from the card in the slot."

Video isn't the problem right now. I'm not really getting any power to anything.
The beeps that the mobo manual explains that help troubleshooting are not occurring. It seems as though no power is making it to pretty much everything except the mobo.


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Related Solutions

#4
September 4, 2011 at 11:35:01
we cant assume that the motherboard is damaged or faulty. 750 watts are nothing compared to the amps on the 12V rail. check those and post them back. ur system requires a good psu to run so check the amps.
also the beeps u speak of dont go on by them selves unless u plug the internal speaker into the motherboard. in ur case its probably a red and black mixed wire with a label saying "speaker" on them plug in the mobo and listen if there are any. usually some motherboards make beep sounds showing that power is not enough im not sure thats the case with urs, but do check that too.

computers are a second home
NVIDIA GeForce
toxict51


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#5
September 4, 2011 at 12:27:27
"Still, however, the PSU's fans has never moved. Doesn't this mean that the PSU is dead?"

Not necessarily.

"When I turn on the PSU, shouldn't the fan turn on, regardless of the mobo and the other parts?"

Not necessarily.

E.g. installing ram that is not compatible with being installed in the mboard can cause no boot, no mboard beeps

If nothing else is wrong, if you remove all the ram then attempt to boot, you will get no video, but the mboard will produce an error beep pattern that indicates no ram is installed, if the pins on the mboard are hooked up to a case speaker or other producing sound device so you can hear the mboard beeps.

"G.Skill F3-12800CL9T (4 x 4 GB..."

GSkil web site
http://www.gskill.com/

Ram Configurator:
http://www.gskill.com/configurator.php

No listings for Asus P8..... anything

No listings when I supply the P8Z68-V PRO model

Two possible module part numbers, but if GSkil lists no modules for your mboard model, there is no info to confirm they will work in your model - they may, they MAY NOT .

[ SNIPER ] F3-12800CL9T-12GBSR2 (4Gx3) 1.25 volts
http://www.gskill.com/products.php?...

[ SNIPER ] F3-12800CL9T-12GBSR (4Gx3) 1.5 volts
http://www.gskill.com/products.php?...

On the other hand

Crucial has listings for your model....

Crucial® Memory Advisor results for the ASUS P8Z68-V PRO Motherboard
http://www.crucial.com/store/listpa...

Memory Type: DDR3 PC3-10600, DDR3 PC3-8500, DDR3 PC3-12800, DDR3 PC3-14900, DDR3 PC3-17000, DDR3 (non-ECC)
Maximum Memory: 32GB
Slots: 4
Each memory slot can hold DDR3 PC3-10600, DDR3 PC3-8500, DDR3 PC3-12800, DDR3 PC3-14900, DDR3 PC3-17000 with a maximum of 8GB per slot.*


Kingston
www.kingston.com
has listings for your model - they're probably all 1.5 volt

Kingston Memory Search

Memory upgrades from Kingston:
Part Number Description Price

Search Results for: ASUS/ASmobile P8Z68-V PRO Motherboard

KVR1066D3N7/1G 1GB 1066MHz DDR3 Non-ECC CL7 DIMM Add
KVR1066D3N7/2G 2GB 1066MHz DDR3 Non-ECC CL7 DIMM Add
KVR1066D3S8N7/2G 2GB 1066MHz DDR3 Non-ECC CL7 DIMM Single Rank x8 Add
KVR1066D3N7/4G 4GB 1066MHz DDR3 Non-ECC CL7 DIMM Add
KVR1066D3N7K2/2G 2GB 1066MHz DDR3 Non-ECC CL7 DIMM (Kit of 2) Add
KVR1066D3N7K2/4G 4GB 1066MHz DDR3 Non-ECC CL7 DIMM (Kit of 2) Add
KVR1066D3N7K2/8G 8GB 1066MHz DDR3 Non-ECC CL7 DIMM (Kit of 2) Add
KVR1333D3N9/1G 1GB 1333MHz DDR3 Non-ECC CL9 DIMM Add
KVR1333D3N9/2G 2GB 1333MHz DDR3 Non-ECC CL9 DIMM Add
KVR1333D3S8N9/2G 2GB 1333MHz DDR3 Non-ECC CL9 DIMM Single Rank Add
KVR1333D3N9/4G 4GB 1333MHz DDR3 Non-ECC CL9 DIMM Add
KVR1333D3N9K2/2G 2GB 1333MHz DDR3 Non-ECC CL9 DIMM (Kit of 2) Add
KVR1333D3N9K2/4G 4GB 1333MHz DDR3 Non-ECC CL9 DIMM (Kit of 2) Add
KVR1333D3N9K2/8G 8GB 1333MHz DDR3 Non-ECC CL9 DIMM (Kit of 2)
............

"Intel i7-2600K, 3.40 GHz"

CPU support list (for P8Z68-V PRO)
http://www.asus.com/Motherboards/In...

It's on the list - bios version 221 or greater required

How to find your present bios version:
http://support.asus.com/Repair.aspx...

If your mboard does NOT have at least that bios version, the mboard would probably boot anyway, the cpu would be set to fail safe lesser settings.
.....

"NVidia Quadro FX4600"

Found on the web -
Minimum system requirements -
750W power supply

"750 W PC Power & Cooling Silencer Mk II "

Single +12v output
http://www.hardwaresecrets.com/full...

It appears according to reviews on the web that it's a decent quality power supply.
A single +12v output section on a PS is recommended these days.
..........

"I tried the four possible different combinations of the on and off positions of the EPU and TPU switches, and it seems that this may have been why"

EPU ? TPU ?

"I am fairly certain I have all the power switches and such in the correct place. As I said, I triple checked, and went through the manual rather meticulously."

In that case, I'm assuming that you followed the directions and had the AC power to the PS disconnected or switched off AT ALL TIMES when you were fiddling with connections and components inside the case.
If you DIDN'T do that AT ALL TIMES, you may have fried the PS, or something connected to the mboard, or the mboard.
.............

Try removing all the ram then attempting to boot the computer.
You should hear a pattern of mboard beeps.

If that doesn't work, the PS may have been damaged by you doing something you shouldn't have done (much more likely) or it's defective (it's not likely it was was when you first received it).

Since your model has onboard video, you could try removing the video card, connecting your monitor to the onboard video port, and attempting to boot the computer.
..........

Your mboard has onboard video and it's main chipset supports Hybrid video - Intel calls that Multi-Monitor support - both the onboard video and the video from a video chipset on a card in a slot being enabled at the same time.

P8Z68-V PRO (home support page)
http://www.asus.com/Motherboards/In...

•LucidLogix® Virtu (Universal Switchable Graphics) - Auto Switching between Integrated Graphics and NVIDIA/AMD Cards

Specs
http://www.asus.com/Motherboards/In...

Intel® Socket 1155 for 2nd Generation Core™ i7/Core™ i5/Core™ i3 Processors
Supports Intel® 32 nm CPU
Supports Intel® Turbo Boost Technology 2.0
* Refer to www.asus.com for CPU support list

(CPU support list
http://www.asus.com/Motherboards/In... )

Chipset Intel® Z68

Memory
4 x DIMM, Max. 32GB, DDR3 2200(O.C.)/2133(O.C.)/1866(O.C.)/1600/1333/1066 Hz Non-ECC, Un-buffered Memory
Dual Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
* Hyper DIMM support is subject to the physical characteristics of individual CPUs.
* Refer to www.asus.com or user manual for the Memory QVL (Qualified Vendors Lists).
* Due to CPU behavior, DDR3 2200/2000/1800 MHz memory module will run at DDR3 2133/1866/1600 MHz frequency as default.

Integrated Graphics Processor

Multi-GPU Support
Supports NVIDIA® Quad-GPU SLI™ Technology
Supports AMD Quad-GPU CrossFireX™ Technology
Supports LucidLogix® Virtu™ Technology

Expansion Slots

2 x PCIe 2.0 x16 (x16 or dual x8)
1 x PCIe 2.0 x16 (x4 mode, black) *1
2 x PCIe x1
2 x PCI

....

Manuals - English one NOT listed
http://www.asus.com/Motherboards/In...

All 6 versions here:
http://support.asus.com/download.as...

Page 83 of the pdf of the English manual

Initiate Graphic Adapter - is set to PCIE/PCI by default

Can be set to
iGPU (onboard video) , PCI/iGPU, PCI/PCIE, or PCIE/PCI

iGPU Multi-Monitor - is set to Disabled by default.

If it is set to Enabled, the video chipset on the graphics card probably MUST be compatible with the Multi-Monitor feature, otherwise you will get NO video from the graphics card's video chipset.



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#6
September 4, 2011 at 20:51:52
I assume you have turned on the power supply's on/off rocker switch, but have you visually checked that your supply voltage switch is actually set to the correct voltage (110/220) and not in between the the settings or on the wrong one.
A common method to make sure all is working properly is to bench test before installing it in the case. Mainly the advice is to ONLY have the PS, MB CPU&heat sink, RAM, mini speaker for beeps, case power switch, and keyboard and use the onboard graphics. This should get you a beep tone for no hard drive and with a monitor will allow you to get into the BIOS set up. Failing this start up you would remove the RAM and should get a beep tone for missing memory. If you do not get anything still you have narrowed it down quite a bit at least. I would then try the power supply in another computer to confirm that it works or not. If it works then it would be the case switch or the motherboard.

You have to be a little bit crazy to keep you from going insane.


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#7
September 4, 2011 at 21:17:27
I never use the on/off switch on the power supply itself anymore if it has one because it's too easy to get the on and off positions confused - I unplug the PS's cord, or switch off the power bar the cord is connected to, instead.
If the switch on the power supply itself is off, nothing will happen when you press the power switch on the case, of course.

When you remove the live AC power to the power supply after it has been connected, any leds that normally light up on the mboard surface will stay on a short time until the capacitors in the PS have been drained.

Most desktop power supplies have a recessed 110/220 voltage switch on the back of it, usually red, which must be set for the voltage where the computer is being used. If you bought the case and the power supply was already in it, or if you bought the power supply separately, from a place or a web site for a country that uses the same AC voltage, that switch is already set to the right voltage. Since it's recessed it's extremely unlikely you would accidently move it to the wrong position. It's a two position slide switch - It has to be all the way one way to one side or the other with the proper voltage showing.

The switches used for a desktop power or reset switch are extremely reliable, especially the power switch. They're both the same type of switch on ATX cases - momentary contact - on only when pressed in. You can connect the reset switch to the pins for the power switch and visa versa.
However, sometimes the case button that presses on the switch can get stuck such that it's always pressing on the switch enough that it's on all the time. In that case, the mboard will shut off about 4 seconds after the switch has been pressed when the button wasn't stuck initially then becomes stuck, and the mboard will not start up again until the button has been un-stuck.


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#8
September 6, 2011 at 07:21:49
Hey there,

Thanks for the help everyone!!
I tried several of these approaches.
Most importantly, I took everything except the mobo and the PSU out, and started testing each part one-at-a-time from there... And I got it to WORK!!! :)

Thank you so much for your help everyone!


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#9
September 6, 2011 at 08:00:03
We're glad to hear you got the computer working, and thanks for the thank you, but you did not mention anything that would be helpful to anyone who comes across this Topic in the future.
Did you figure out what the specific problem was ?
If so, tell us what it was, in another post.

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#10
September 6, 2011 at 12:47:02
I apologize.
The thing is, I'm still not entirely sure what the problem was. I merely took everything except the mobo and the PSU out, and then tested each part one-at-a-time, as to eliminate variables.
Again, I apologize if this is not much help!

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#11
September 6, 2011 at 14:20:53
Thanks for that.
If you're not sure, there's no need to apologize.

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#12
December 17, 2011 at 19:15:22
I had the exact same problem and found this forum via Google hoping there might be a silly configuration of the switches on the MB I wasn't aware of but after unplugging everything except the MB and still getting the same I tried swapping PSUs. It was defective out of the box.

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#13
December 17, 2011 at 20:57:06
lopsire

"It was defective out of the box."

What was ? The mboard or the power supply ?

If you haven't solved your problem, click on the Start a new discussion (a.k.a. Start a new Topic) orange button at the bottom of the page and supply all the info you can come up with, including
- the make and model of the mboard
- the cpu model
- if you're using a video card or cards in (a) mboard slot(s), the make and model of that (those).
- the wattage capacity of the power supply
- the part numbers and brand of the ram module(s)



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