Strange motherboard problems

[Shepanator]

Hello chaps.

 

Motherboard model: Asus Z170 Deluxe

Firmware: Latest

I've been having problems with my motherboard for months. They're all pretty minor problems but every now and again a new one crops up, none of them are game breakers (yet!) which is why I didn't immediately replace it.

Another problem is that Asus' returns policy is to take the mobo back to the retailer, and I no longer live in the same country as where I bought it so it would be some undertaking. Not only that but I got in touch with the retailer (overclockers UK) and they would need to do testing before deeming it a valid return. This poses a problem because the motherboard's issues are so utterly random and aren't always reproducable.

Here are my problems:

• PC randomly turns back on

Occasionally after shutting the PC down or putting it into hibernation it just decides to turn back on after a few seconds. This definitely isn't a PSU issue as I've replaced the power supply already and have ruled out power switch malfunction. The only way to make the PC actually stay off in this situation is to cut power.

• Strange bootup behaviour

Sometimes when booting up the PC it will turn on for a second, then it will blink off for a second, then turn back on again and boot normally. Other times the PC fails to boot at all and stays on a black screen until power is cut. A third strange behaviour is sometimes the motherboard will say it's updating (when it's not), and then stay on the update screen for hours or sometimes indefinitely until the power is cut.

 

This can't be a firmware issue, as I've always kept the BIOS up to date since I got the mobo in late 2015 and these problems have persisted across versions. I've tried disabling my overclock, that didn't help. Pretty much every debugging step you can think of I've tried. I've also googled all of these problems and found no answers.

I know at this point that I'm returning the motherboard, I was just hoping somebody would be able to shed a little bit of light onto this and maybe give me some information I can pass on to overclockers when I return it so they can at least identify a problem and process my return.

Thanks in advance for any help.

 

Here's the rest of my system specs:

6700k

Samsung NVME SSD

Gigabyte 980ti

Corsair HX750i

2TB HDD (x2)

 

[hignom]

Check if there is some screw or there are something touching contacts behind the mobo, try it in a ideal situation, no GPU just the hard drive a ram module and test it then try it if there is the same issues just return it is a faulty mobo. Try to check the if heatsink is well placed on the CPU.

 

And all that things you tested.

   -Restore the bios.

   -Check RAM modules.

   -Check all the cable conection.

   -Check that all the pins are in no contact with anything.

   -Check socket temps.

You know all that things...If u did all that and u have nothing...then return it