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PC starts for 1 second then shuts down

XrayHunter7
Level 7
Hi, I built my PC. It starts for 1 second then shuts down. I try every possible combination. Like another PSU, disconnect everything, one RAM stick, no RAM stick etc.... Everything is working without CPU. I put CPU in to motherboard and nothing works. I have connected 8pin + 24pin to mb. I also try connecting 8pin + 4pin +24pin to mb. So I was like OK, This will be bad CPU. Everything runs great without CPU. So I bought new CPU and its same. What can be wrong ? Motherboard show code 00 for that one second.
PC:
Intel Core i7-7820X
ASUS ROG POSEIDON GeForce GTX 1080Ti Platinum edition OC 11GB
SSD disk Samsung 850 EVO 1TB
SSD disk Samsung 960 EVO 500GB
Phanteks Enthoo Primo Ultimate
Corsair 32GB KIT DDR4 3466MHz CL16 Vengeance RGB Series
EVGA SuperNOVA 1000 G2
ASUS ROG STRIX X299-E GAMING
EKWB Cooling system
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15 REPLIES 15

Chino
Level 15
Are you 100% positive that none of the QLEDs remain lit?

Also you mentioned updating to the latest BIOS with USB BIOS Flashback. Did the updated finish properly?

Chino wrote:
Are you 100% positive that none of the QLEDs remain lit?

Also you mentioned updating to the latest BIOS with USB BIOS Flashback. Did the updated finish properly?


Yes, It was 100% same as tutorial on Youtube. I can see only one red light when I unplug 8pin and "lights for style".67607

Chino
Level 15

Panterluca
Level 7
Try removing the cmos battery and then shorting the cmos flash pins, I had a similar issue with this board. If that doesn't work use flashback to load a new bios I had an issue where the bios got corrupted and wouldn't remain powered up for longer than a second


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Nixon2992
Level 7
May you have corupted LGA belts in socket?

TheBoatswain
Level 7
Do you have anything plugged into the first two USB ports that are not USB 3.0? I had the same issue and I was freaking out but I was using a USB 2.0 mouse and keyboard so I unplugged them and plugged the into 2.0 and 3.0 ports to the right of LAN port. Started it again and wow it booted to bios. Board was fine.
Asus Rampage VI Apex, Intel X9 7900X, Gskill 3600, EVGA GTX 1080 Ti SLI, 4 SSD, 1 M.2 SSD