[Troubleshooting] Mobo Doesn't Power On Right Away

elzekk · May 10, 2017

###Troubleshooting Help:

**What is your parts list?

[PCPartPicker part list](https://pcpartpicker.com/list/XjdGRG) / [Price breakdown by merchant](https://pcpartpicker.com/list/XjdGRG/by_merchant/)

[PCPartPicker part list](https://pcpartpicker.com/list/XjdGRG) / [Price breakdown by merchant](https://pcpartpicker.com/list/XjdGRG/by_merchant/)

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i7-7700K 4.2GHz Quad-Core Processor (Purchased For $326.24)
CPU Cooler: Cooler Master - MasterLiquid Pro 280 64.2 CFM Liquid CPU Cooler (Purchased For $89.99)
Motherboard: Asus - STRIX Z270H ATX LGA1151 Motherboard (Purchased For $167.28)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 Memory (Purchased For $113.99)
Storage: Western Digital - Blue 1TB 2.5" Solid State Drive (Purchased For $279.00)
Video Card: EVGA - GeForce GTX 1080 Ti 11GB SC Black Edition Video Card (Purchased For $699.99)
Case: NZXT - S340 Elite (Black) ATX Mid Tower Case (Purchased For $99.99)
Power Supply: EVGA - SuperNOVA G3 650W 80+ Gold Certified Fully-Modular ATX Power Supply (Purchased For $89.99)
Monitor: Acer - XB271HU bmiprz 27.0" 2560x1440 165Hz Monitor (Purchased For $250.00)
Total: $2116.47
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-10 14:36 EDT-0400

**Describe your problem. List any error messages and symptoms. Be descriptive.**

When I press the power button, the case fans start spinning but the motherboard doesn't power up and my AIO cooler doesn't turn on. I don't have the video card just yet. It arrives Monday.

**List anything you've done in attempt to diagnose or fix the problem.**

I have to unplug the power cord from the back of the PSU, press the power button on the case, then plug the cord back in to the PSU to power it up. Once I do that the system runs fine until I turn it off again.

I unplugged the CPU and mobo power cables and plugged them back in to make sure it was a good connection. That didn't seem to fix it.

**Post relevant photos of build/parts here.**

I can take photos of the MOBO but not sure if that's necessary.

**Provide any additional details you wish below.**

I copied this from reddit r/buildapc in the hopes that I can figure out what the problem is before my return window expires in case something is wonky. Thanks in advance for the help!

t53186 · May 10, 2017

Please explain system runs fine, do you get bios to display on your monitor?

"I have to unplug the power cord from the back of the PSU, press the power button on the case, then plug the cord back in to the PSU to power it up. Once I do that the system runs fine until I turn it off again"

elzekk · May 10, 2017

Bios displays, I can boot in to windows and play games, do whatever I need to do. Just on initial boot, when I press the power button on the case, the motherboard appears to not have power. Unplugging the psu cord, hitting the case power button, then plugging the cable back in and pressing the case power button makes everything work as normal.

scout_03 · May 10, 2017

unplug the front panel switch from board and with a small flat screwdriver momentary touch both power ontact on board to see if system will start without having to play with psu plug .

elzekk · May 10, 2017

Should say too that I got the video card and installed it. When I power the computer on the video card lights up and fans start spinning but still the motherboard power and AIO cooler don't start until after I unplug/plug back in the psu power cable.

scout_03 · May 10, 2017

if you have onboard remove gpu and do boot test with power switch only also do you board led is always on when psu is under power .

elzekk · May 10, 2017

I was having this problem before I installed the video card too running off onboard graphics. There is a small LED light on the board that is illuminated in the bottom right hand corner. I will have to double check tonight when I get home.

scout_03 · May 10, 2017

so use onboard since board receive power recheck all power cable from psu to board also are you shure you did not bent a pins from cpu when you did the install the other thing you will have to check is psu with another one .

elzekk · May 11, 2017

So after looking over the board, the POWER LED in the bottom right of the board is illuminated when the system is off. When I hit the case power button everything starts up but the motherboard and CPU cooler. When I hit the power switch on the back of the PSU to turn it off, then back on, then the case power button, everything works and windows boots like normal.

scout_03 · May 11, 2017

if you play with the power switch on the psu and system boot i would try another psu look like the one you have is not working good .

elzekk · May 12, 2017

I can try a different PSU from an older machine. Just seems weird that everything else but the motherboard works fine on initial power up and the mobo only comes on after a power cycle. Maybe the CPU or 24 pin connector cable is bad?

scout_03 · May 12, 2017

you talk about the 24 pins but what about the other atx cable for board like a 4 or 8 pins one and make shure you did not bent cpu pins on the install .

elzekk · May 12, 2017

Definitely sure no CPU pins are bent. I double checked. I pulled the 8 pin and 24 pin connectors from the board and resocketed it. No changes.

scout_03 · May 12, 2017

i read back about the psu unplug to have system restart i would check system with another psu .

elzekk · May 13, 2017

Found the solution.

Change the CPU System Agent Boot Voltage and CPU VCCIO Boot Voltage to 1.150. Fixed the problem.

fusseli · May 19, 2017

I have the exact same problem on my Z270H and 0906 bios, with a gpu card installed. It's not gpu related it seems. It's really annoying, the only way to reboot after a shutdown is to remove power from the PSU, wait, and power on again.

I'm trying this now
"Change the CPU System Agent Boot Voltage and CPU VCCIO Boot Voltage to 1.150. Fixed the problem."

Search

[Troubleshooting] Mobo Doesn't Power On Right Away

elzekk

Distinguished

elzekk

t53186

Distinguished

elzekk

Distinguished

scout_03

Titan

elzekk

Distinguished

scout_03

Titan

elzekk

Distinguished

scout_03

Titan

elzekk

Distinguished

scout_03

Titan

elzekk

Distinguished

scout_03

Titan

elzekk

Distinguished

scout_03

Titan

elzekk

Distinguished

fusseli

Prominent

TRENDING THREADS

Latest posts

Moderators online

Share this page