Gigabyte GA-B85N Phoenix-WIFI Boot Loop/BIOS Problem

[barbecue]

Hi there,

I'm in a pretty sticky situation. I recently built a computer about 2 weeks ago for someone, and I've been testing it out and making sure everything works correctly. The day that I'm ready to package it up and send it, I power it on one more time and I notice that the motherboard no longer functions correctly. It turns on, lasts a second, then powers off. 3 seconds later, the process continues and it powers on then powers off.

• 
  CPU: Intel Core i3-4370
  Motherboard: Gigabyte GA-B85N PHOENIX-WIFI
  Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600
  Storage: Mushkin Atlas Series 120GB mSATA Solid State Drive
  1TB OEM Hard Drive
  250GB WD Black
  PSU: EVGA 430W 80+ Certified ATX Power Supply

I'm starting to get really desperate because I can't find any solutions online or on this forum that work for me. I've reset the CMOS (or at least I think I have), I don't know how to get into the backup bios, my motherboard doesn't have a speaker, the computer isn't on long enough for me to see anything on my monitor, and unplugging everything out of the motherboard doesn't help either.

To be clear, I have used this computer very reliably for a couple weeks and all of the components work correctly with each other. The last thing I did before this happened was plug in an extra hard drive and attempt to boot off of it before powering the computer off.

Any help is appreciated. Maybe in the end I should just return the motherboard and buy from a different brand... I'm starting to wonder if I should avoid Gigabyte motherboards in general (I've recently experienced problems with their Brix motherboards).

 

[i7Baby]

The CPU fan running?

 

[barbecue]

The CPU fan running?

Yes.

The way that the CPU fan would function before this problem was that it would spin slowly then spin really fast after a second or so, then slow down again to normal speed. With this problem, the first part of the sequence starts (e.g the fan moves a little bit) but it never goes to full speed because the computer shuts down before it can.

 

[i7Baby]

Have you plugged in BOTH power supply connectors to the motherboard?

 

[barbecue]

Have you plugged in BOTH power supply connectors to the motherboard?

Yep. Both 24 pin ATX and 4 pin CPU.

 

[i7Baby]

Check your PSU voltages or replace the PSU with something better. See http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html#xtor=EPR-8886

Try another CPU cooler or fan.

 

[barbecue]

Check your PSU voltages or replace the PSU with something better. See http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html#xtor=EPR-8886

Try another CPU cooler or fan.

Do you think that maybe the CPU is heating up too fast and then shutting down to save itself from overheating? Or do you think that the PSU isn't providing enough power... Because if it's the first problem, I have another Intel stock CPU fan that when I plugged into the motherboard moves a lot more than the stock cooler in there now.

 

[i7Baby]

Try the other cooler. It could be either or both.

 

[barbecue]

Try the other cooler. It could be either or both.

I just tried switching out the coolers, but the same thing keeps happening. I guess I'll have to find a new PSU...

 

[Undonetv]

Wait I have the same issue with a inel i7 processor, x2 8gb DDR3 Ram, and a corsair CX600M. The board lights up with the built in leds all the fans spin but no post