Computer not turning on, can’t find a solution

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ardufault2316

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Jan 4, 2018
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I’ve been using a Cyberpower GUA570 desktop, but decided to upgrade. I took out the motherboard, RAM, processor, CPU cooler, and hard drive, and replaced them with
Motherboard: MSI Z270 Mortar
CPU: Intel i7-7700k
RAM: Trident Z RGB DDR4 2x8GB 3000
CPU Cooler: Hyper 212 EVO
SSD: Samsung 850 EVO 250GB SSD
I reused my old graphics card, a GTX 960.
I’ve plugged in everything that I believe needs to be plugged in, but when I plug in the power and try to turn it on, the case fans briefly spin and the MSI EZ debug LED for CPU flashes. After that, everything goes still and to have the fans spin and the light blink again I have to unplug the power from the back of the case, flick the power switch off, plug the power back in, and flick the switch back on again, and then press the front power button. I’ve been troubleshooting all night and I think now is the time to ask the experts.
 
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krzyimprt

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Mar 25, 2013
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Run through this checklist, verify that everything is correct, don't just read it.
http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

If you're still having issues, come back to this thread.
 
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ardufault2316

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Jan 4, 2018
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On the side of my power supply, it says High Power 600W Switching Power Supply. I’m currently going through the tests with a multimeter. The fans do turn on and stay on when I do the paper clip trick. In a video I was watching, they tested the actual power cord and got 241.8 V and when I did it, I got 121.9 V. Could this be part of the problem?
 
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krzyimprt

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If you can, take a picture of the power supplies spec sticker. Sounds like an unreliable off-branded PSU.
 
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ardufault2316

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Jan 4, 2018
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Alright, I’ve now tested all the pins on the big ATX 24 pin connector (it’s one big strip of 20 pins and a separate thing of 4) and everything looked good. Not sure if this could be a problem, but the red pins all read 5.23V which I believe is .03V over the normal tolerance.
 
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ardufault2316

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Jan 4, 2018
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I’ve definitely screwed something up now... I had the fans going with the paper clip trick and tried to plug in the system fan connecter to the SYS_FAN1 port on the motherboard, which caused something to ignite briefly above and to the left of the SYS_FAN1 port. I immediately turned off the power switch and the spark went out, but now it smells like smoke and there’s a mark where the spark occurred. When this happened I did not have the RAM or GTX 960 attached to the motherboard. I’ve probably bricked the CPU and everything now, haven’t I?
 
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krzyimprt

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Mar 25, 2013
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When you do the paper clip trick the power supply is suppose to be completely disconnected from the motherboard, all cables. It's just a test to verify that the PSU turns on, it's not a definitive answer because a psu can still turn on but not work properly. You more than likely fried a resistor or something because of the paper clip. As for that power supply, it's not really a name brand, mediocre to average at best.
 
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krzyimprt

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I'm assuming you still had the 8pin CPU connected to the motherboard when you bridged the PS-on(green wire) to a black ground wire on the 24pin? Motherboard is most definitely fried. As for the CPU I'm not sure. For future reference never jump start a PSU with it still connected to a motherboard.
 
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ardufault2316

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Jan 4, 2018
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Nothing from the power supply was connected when I jump started the PSU, it was only after I had the fans going that I tried to plug in the system fan 4 pin connector and then something blew.
 
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krzyimprt

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You had to have something connected to the motherboard. Otherwise it wouldn't of friend when you plugged in the fan connector.
 
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