Power up problem

[TheDroneGamers]

Hi, in march this year I built my first PC, i've been using it fine and have even overclocked the cpu but i've still got a few issues with it and was wondering if one of you could help me? My first issue is that my H100i is not being detected in corsair link, i've tried plugging it into another USB header on the motherboard and that didn't work, plugging it in and out when in the OS to see if it detects it and that didn't work either. (I know the motherboard header isn't the problem because my AX760i works fine in Corsair Link on both of them).

My second issue is that I have to 'hold' my power button down for a few seconds when powering it up, this is because if I do not, my motherboard power light just flashes for around 1.5 seconds and then it won't power up so I have to make sure I press the power button during that time. I had my PSU tested by Scan and it was RMA'd originally because it didn't even flash and they said my motherboard was fine so I'm assuming I have another faulty PSU?

If anyone could help me with either of these issues I would really appreciate it. Thanks. (Also I've tried resetting the BIOS to fix the PSU problem and I've also updated it)

Processor: Intel® Core™ i7-4770K @ 4.4GHz
Motherboard: Gigabyte GA-Z87X-OC
Graphics Card: Gigabyte GV-N78TOC-3GD @ 1150MHz
Memory: Corsair Vengeance® Pro Series — 16GB (2 x 8GB) DDR3 DRAM 2400MHz C11 Memory Kit (CMY16GX3M2A2400C11R) @1866MHz
Hard Drive: Seagate ST4000DX001 + Seagate Pipeline HD 2TB
Case: Cooler Master HAF X
Optical Drive: Asus BC-12D2HT
PSU: Corsair AX760i
Cooling: Corsair Hydro Series™ H100i + Arctic Silver 5
PCI Cards: Asus ROG Xonar Phoebus Solo + Intel EXPI9301CTBLK
Operating System: Microsoft Windows 8.1

 

[Darkbreeze]

Almost sounds like maybe a bad switch. You should be able to bypass the switch (Google it) to see if that's the issue. If not, I'd test the PSU manually using a meter. You can do so following these procedures, or you can RMA it if the switch isn't the problem. Most RMAs don't return a new item. They usually either "repair" you item or provide with a "repaired" unit that somebody else RMA'd so there is often a high rate of recurrent failure on some types of RMA hardware.

https://www.youtube.com/watch?v=ac7YMUcMjbw

 

[Vic 40]

Your motherboard has an onboard startbutton,how does it start from that?