"New" Build Troubleshooting

Malkiot

Reputable
Dec 29, 2015
2
0
4,510
Hey, I was planning on building my father a new pc for xmas using old and new parts. Unfortunately the delivery of parts was delayed pushing the project back to today.

Now, this isn't my first rodeo and as far as I can tell it's all connected up properly. However, when I push the power button the power led briefly flashes on and off and nothing else happens.

I've verified that everything that can be connected is connected. And I followed this guide: http://www.tomshardware.co.uk/forum/261145-31-perform-steps-posting-post-boot-video-problems

The only thing thing that I can think of is that the CPU power is insufficient (8-pin connector on mainboard, only a 6-pin and a 4-pin left over from the PSU, so I can connect only 6-pins). Could anyone confirm this or the opposite?

If it should start, despite only needing a 6-pin connector, I'll have to go through all the parts one by one to check which on is broken... so I'd like to avoid that.
 
Solution
Although I don't know what parts you are using, if I understand correctly, you have a 6 pin power connector going into the 8pin EPS connector on the motherboard. If so, that is not going to work. The 4pin connector will work. The reason for that is the 6 pin is for PCIe and is wired opposite of EPS
Although I don't know what parts you are using, if I understand correctly, you have a 6 pin power connector going into the 8pin EPS connector on the motherboard. If so, that is not going to work. The 4pin connector will work. The reason for that is the 6 pin is for PCIe and is wired opposite of EPS
 
Solution


Yes, the 6 pin is for PCIe. You should have a cable that has two 4 pins. Or a single 4 pin if its an older PSU.
 
That would explain it. I just remounted the heatsink after checking the thermal paste (cleaned it and replaced the paste, obviously) and accidentally tested it without any connectors and it worked also...

Going to connect the 4-pin up now.

Thank you for your speedy replies. I never encountered this before as usually I have connectors to spare! (Using a very cheap PSU because of a very tight budget on this build)