PSU Power fluctuations

[THOMSETHOM]

When I turn on the power for the PC, not booted yet. The motherboard lights blinks and graphics power lights blinks.

I look's like the voltage goes up and down and sometime to zero. And it can't boot.

 

Then you might think the cables? I have checked it and even switched it out.

 

But when I turn on the power and quickly press the power button, it powers on and everything works normally.

What could then be the problem then? Becouse the PSU delivers power normaly when the system is on.

 

SPECS:

Motherboard: ASUS RAMPAGE IV EXTREME

GPU: GTX 1080 TI

PSU: Corsair AX860i

[Haro]

14 minutes ago, THOMSETHOM said:

But when I turn on the power and quickly press the power button

wait so the only way it boots is turning the power button as quickly as you can ?

[THOMSETHOM]

39 minutes ago, TofuHaroto said:

wait so the only way it boots is turning the power button as quickly as you can ?

Yes

[Haro]

3 minutes ago, THOMSETHOM said:

Yes

how old is this AX psu ?

[THOMSETHOM]

1 minute ago, TofuHaroto said:

how old is this AX psu ?

About half a year to a year

[Haro]

Just now, THOMSETHOM said:

About half a year to a year

this is very unlikely the reason but have you tried 

updating the bios 

clearing the cmos 

and maybe trying a different psu ? 

also when did the issue start occurring 

[THOMSETHOM]

3 minutes ago, TofuHaroto said:

this is very unlikely the reason but have you tried 

updating the bios 

clearing the cmos 

and maybe trying a different psu ? 

also when did the issue start occurring 

I don't think the firmware has anything to do with it as the power control come's from the power supply and not the motherboard. And it started yeesterday.

[Haro]

1 minute ago, THOMSETHOM said:

I don't think the firmware has anything to do with it as the power control come's from the power supply and not the motherboard. And it started yeesterday.

my only guess is maybe try using a a different psu maybe a friend's