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New build now power cycling after working 12ish hrs
10-17-2016, 12:36 PM,
#1
New build now power cycling after working 12ish hrs
Hello! I am having an issue with a recent build of my computer. I am new to building my own computer. These are the components I have (it's a Tier 2 build):

CPU: Intel Core i3-6100 LGA1151
Motherboard: Gigabyte GA-H110M-A Micro-ATX LGA1151
RAM: G.SKILL NT Series 16GB (2x8GB) Dual-Channel Kit DDR4 2400MHz
Video Card: Radeon RX 460 4G
Storage: Seagate ST1000DM003 1TB 7200rpm
Optical Drive: ASUS 24X SATA DVD Burner
Power Supply: EVGA 430W 80+
Case: SilverStone PS08B Micro-ATX
OS: Windows 10 Home

I'm going to give the long version of what happened and what I've tried to see if anyone can help. So I got all my parts and followed a guide and got everything together. My husband helped me a bit with the first couple things like installing the CPU. When he took the CPU fan out of the box, he accidentally smeared a very small portion of the thermal paste, but everything looked good. I put all the components in and it started right up. Brought it to my monitor (which was still attached to my current computer), and saw quickly that it was POSTing to BIOS. I installed the optical and hard drive and then installed Windows. It was running great and I let Windows activate and went to bed. The next day, I was using the included disks to update graphics driver and some utilities for the motherboard. I did NOT update the firmware for the motherboard. I had to go do something, so I left the computer to restart after it finished updating the GPU driver. At this time, the computer had been up and running for 12 hrs. While checking things out, I had noticed under the System display in Windows that it said I only had 8 GB RAM, but I know I installed 16. Later that day I came back to my computer to check it and it was off. I figured since it was off, I would make sure that both sticks of RAM were seated correctly. I unplugged the system and made sure to discharge static to the best of my ability, and checked both sticks by removing them entirely and reseating them. Put everything back together and powered it up. Suddenly my system was power cycling endlessly after approx 15 secs. I could not turn it off fully using the power switch on the case and had to use the switch on the PSU. This behavior continued, although intermittently, the power switch on the case sometimes just wouldn't work either. If left running, it would just continue power cycling every 15 secs. I let it run for about 30 minutes at one point with no change in behavior. It never reaches BIOS that I can tell.

Trouble shooting steps taken:
I tried many things including removing each stick of RAM and trying it in either slot with the same behavior, as well as checking power cable connections and every other recommendation for failure to POST that I could find.
I slowly removed each component and tried it and it continued to power cycle until I removed the CPU. Without the CPU it would stay powered on and would turn off with the power switch on the case. We inspected the CPU socket and there was 1 bent pin. Believing we had diagnosed the issue, we bought the same motherboard and replaced it, using new thermal paste after removing the old. With only the new motherboard and the CPU, the issue still occurred. At that time we assumed it was the CPU. Sent it back and got the replacement on Friday. Just put everything back together (just new motherboard and new CPU + RAM), and the issue still occurs. Still happens if RAM is removed. My old/current computer has a PSU with the same specs, so I tried powering it up using that PSU as I know that it works. The issue still happens. I have noted that even after switching off the PSU by it's power switch, the motherboard still attempts to turn on with any residual power. Oh, and I do not have a case speaker so there is no beeps Smile I am hoping to pick up a case speaker by this evening.

At this point I am baffled. I don't know what the issue might be or what my next step is. Can anyone see anything I have missed? My only other idea is to take it into a shop for someone to look at it.
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10-17-2016, 02:19 PM,
#2
RE: New build now power cycling after working 12ish hrs
Three things I'd check:

Switch off the PSU. Unplug the power plug. Clear CMOS and remove the battery for two minutes before putting it back. Replug the power cord, switch the PSU back on.

Remove the video card. Plug the monitor into the motherboard video output. See if it boots to BIOS. If it does, it's probably just the video card that wasn't seating properly in the slot.

Double-check to make sure that there's nothing causing a short somewhere. A loose power cable touching metal, etc.
Laptop: MSI GS30 Shadow-045 Dimensions: 12.6" x 8.9" x 0.8" 2.65lbs CPU: Intel Core i7-4870HQ Quad-Core + Hyper-Threading OC 2.5-3.9GHz RAM: 16GB DDR3 1600MHz Video Card: Intel Iris Pro 5200 Storage: 2x128GB SDD RAID0 Audio: ASUS Xonar U3 USB Sound Card + Audio-Technica ATH-M50 headphones Screen: 13.3" - 1920 x 1080 IPS + 27" Dell P2715Q IPS 3840 x 2160 Keyboard: Filco Majestouch MX Cherry Blue Mouse: Logitech MX518
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10-17-2016, 02:50 PM,
#3
RE: New build now power cycling after working 12ish hrs
(10-17-2016, 02:19 PM)MathieuB Wrote: Three things I'd check:

Switch off the PSU. Unplug the power plug. Clear CMOS and remove the battery for two minutes before putting it back. Replug the power cord, switch the PSU back on.

Remove the video card. Plug the monitor into the motherboard video output. See if it boots to BIOS. If it does, it's probably just the video card that wasn't seating properly in the slot.

Double-check to make sure that there's nothing causing a short somewhere. A loose power cable touching metal, etc.

Thanks for replying! I had done those things previously, with no success. I went out today and bought a motherboard speaker so I could maybe find out something from that. Plugged in the speaker and for the first time in forever, it booted right up and made it to the bios. I am actually posting from the new build now. Still have no idea what happened...
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10-17-2016, 05:10 PM,
#4
RE: New build now power cycling after working 12ish hrs
Good idea for the speaker, if you have more issues, it will help narrow it down.

Glad to hear that it's now working properly Smile
Laptop: MSI GS30 Shadow-045 Dimensions: 12.6" x 8.9" x 0.8" 2.65lbs CPU: Intel Core i7-4870HQ Quad-Core + Hyper-Threading OC 2.5-3.9GHz RAM: 16GB DDR3 1600MHz Video Card: Intel Iris Pro 5200 Storage: 2x128GB SDD RAID0 Audio: ASUS Xonar U3 USB Sound Card + Audio-Technica ATH-M50 headphones Screen: 13.3" - 1920 x 1080 IPS + 27" Dell P2715Q IPS 3840 x 2160 Keyboard: Filco Majestouch MX Cherry Blue Mouse: Logitech MX518
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