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New motherboard won't post.

So I thought my psu was fried, until I tested it on my other build and it worked. My pc powers on for a split second, not even 1/2 a second, then turns off. However, I unplugged the EPS cable and now at least it stays on for 3 seconds. It also restarts in a constant loop every 3 seconds. I have stripped everything and am using only 1 stick of ram, onboard graphics, cpu psu and mobo. Another working powersupply from another build doesn't work either. I suspected it to be either the cpu or mobo, so I replaced the mobo and it's still happening. It's on cardboard right now and the motherboard is a gigabyte ga-z87-hd3. I7 4770. Cx750m and rm850x. I need this build up and running for my son's birthday coming up in a week.

 

I have also reset cmos, new battery, and tried every ram slot. The motherboard is a refurb from eBay which he took pictures of it working before shipping. No bent pins, nothing seems exploded or shorted on the motherboard. 

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12 minutes ago, Yikchandev2 said:

So I thought my psu was fried, until I tested it on my other build and it worked. My pc powers on for a split second, not even 1/2 a second, then turns off. However, I unplugged the EPS cable and now at least it stays on for 3 seconds. It also restarts in a constant loop every 3 seconds. I have stripped everything and am using only 1 stick of ram, onboard graphics, cpu psu and mobo. Another working powersupply from another build doesn't work either. I suspected it to be either the cpu or mobo, so I replaced the mobo and it's still happening. It's on cardboard right now and the motherboard is a gigabyte ga-z87-hd3. I7 4770. Cx750m and rm850x. I need this build up and running for my son's birthday coming up in a week.

 

I have also reset cmos, new battery, and tried every ram slot. The motherboard is a refurb from eBay which he took pictures of it working before shipping. No bent pins, nothing seems exploded or shorted on the motherboard. 

Check your motherboard, there should be a switch on it that will allow you to use the backup bios.

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57 minutes ago, Yikchandev2 said:

There's no switch;/

Did some googling. Try this.

 

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3 hours ago, Yikchandev2 said:

So I thought my psu was fried, until I tested it on my other build and it worked. My pc powers on for a split second, not even 1/2 a second, then turns off. However, I unplugged the EPS cable and now at least it stays on for 3 seconds. It also restarts in a constant loop every 3 seconds. I have stripped everything and am using only 1 stick of ram, onboard graphics, cpu psu and mobo. Another working powersupply from another build doesn't work either. I suspected it to be either the cpu or mobo, so I replaced the mobo and it's still happening. It's on cardboard right now and the motherboard is a gigabyte ga-z87-hd3. I7 4770. Cx750m and rm850x. I need this build up and running for my son's birthday coming up in a week.

 

I have also reset cmos, new battery, and tried every ram slot. The motherboard is a refurb from eBay which he took pictures of it working before shipping. No bent pins, nothing seems exploded or shorted on the motherboard. 

 

I had similar / exact symptoms with my i7-6800K on my ASUS X99 Deluxe II motherboard some time ago.

Since I had spare parts lying around (everything aside from a spare LGA 2011-v3 CPU and compatible motherboard), I ruled it down to the CPU or motherboard.

Decided to bring it into a local PC store, who had extra CPU and motherboard.

 

Your system might have suffered the same fate.

I hate to say it, unfortunately, at least for me, it was the CPU that ended up dying.

Couldn't get a replacement from Intel (since LGA 2011-v3 is already discontinued), so they gave me a refund instead, LUCKILY.

Intel Z390 Rig ( *NEW* Primary )

Intel X99 Rig (Officially Decommissioned, Dead CPU returned to Intel)

  • i7-8086K @ 5.1 GHz (still tweaking) -- i7-6800K
  • Gigabyte Z390 Aorus Master -- ASUS X99 Deluxe
  • Sapphire NITRO+ RX 5700 XT Special Edition -- 2x Sapphire NITRO R9-Fury in Crossfire
  • 32GB G.Skill TridentZ DDR4-3000 CL14 (16GB TridentZ RGB + 16GB Red/Black TridentZ)
  • SanDisk 480 GB SSD + 1TB Samsung 860 EVO + 1TB Intel 660p NVMe
  • EVGA SuperNOVA 850W P2 + Red/White CableMod Cables
  • Phanteks Enthoo Luxe Tempered Glass Edition
  • Ekwb Custom loop
  • Logitech G502 Proteus Spectrum + Corsair K70 (Red LED, anodized black, Cheery MX Browns)

Intel Z97 Rig (Secondary)

  • Intel i5-4690K 4.8 GHz
  • ASUS ROG Maximus VII Hero Z97
  • Sapphire Vapor-X HD 7950 EVGA GTX 1070 SC Black Edition ACX 3.0
  • 20 GB (8GB X 2 + 4GB X 1) Corsair Vengeance DDR3 1600 MHz
  • Corsair A50 air cooler  NZXT X61
  • Crucial MX500 1TB SSD + SanDisk Ultra II 240GB SSD + WD Caviar Black 1TB HDD + Kingston V300 120GB SSD [non-gimped version]
  • Antec New TruePower 550W EVGA G2 650W + White CableMod cables
  • Cooler Master HAF 912 White NZXT S340 Elite w/ white LED stips

AMD 990FX Rig (Decommissioned)

  • FX-8350 @ 4.8 / 4.9 GHz (given up on the 5.0 / 5.1 GHz attempt)
  • ASUS ROG Crosshair V Formula 990FX
  • 12 GB (4 GB X 3) G.Skill RipJawsX DDR3 @ 1866 MHz
  • Sapphire Vapor-X HD 7970 + Sapphire Dual-X HD 7970 in Crossfire  Sapphire NITRO R9-Fury in Crossfire *NONE*
  • Thermaltake Frio w/ Cooler Master JetFlo's in push-pull
  • Samsung 850 EVO 500GB SSD + Kingston V300 120GB SSD + WD Caviar Black 1TB HDD
  • Corsair TX850 (ver.1)
  • Cooler Master HAF 932

 

<> Electrical Engineer , B.Eng <>

<> Electronics & Computer Engineering Technologist (Diploma + Advanced Diploma) <>

<> Electronics Engineering Technician for the Canadian Department of National Defence <>

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