Problem with my new build

Feb 20, 2018
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I got my new build set up for a month now.
Last days when I shut down the system and then I turn it on.it boots but motherboard doesn't open the red white or green lights and cpu cooler doesn't works.ram less works and motherboards lights too.when I unplug or leave it for sometime it boots correctly with no problem. If I restart the pc works perfect.it does that only on sleep mode or shutdown.i have changed rams slot or boot it with one change cmos.i think it might be a failure on the psu power at the boot voltage. Please let me your thoughts.
Pc specs :i7 8700k
Tridenz 2X8 3000HZ
ASUS 1050 STRIX TI OC
TOSHIBA SAD
COOLER NOCTUA
NO OVERCLOCK AT ALL.
 
Feb 20, 2018
5
0
10
It's so weird that once the pc is on it RUN games without problem and everything running smooth.temps are low .It's a crazy thing to deal with.once you shut down then if you are lucky will boot again normally.unless you turn of switch and wait don't know how long