Pc wont turn on

[seif199]

Mobo lights on , lan plug light on, pc wont turn on

I9 1085k no oc/ Asus ROG z490m G / corsair dominator 4000mhz 32gb/ psu 800w 
 Pc wont turn on, when i press the power button nothing happens, mobo rgb light are on , the lan plug on mobo lights on so seems mobo is fine, shorting power switch on mobo dont work so it is not the switch, paper clip shortning the psu works so psu seems to work, tried 2 different cmos batteries, tried reseating everything, tried only the 24 pin and the cpu 8pin still nothing, clearing cmos ,un plugging pc for a day , using a second working psu , still didnt work , what is the cause of this problem
PS : we had rain and thunderstorms for 2 weeks with power shutdowns but it was working the night before
Last friday this problem happened so i have done all of these steps and pc turned on by it self at night worked normal for 2 days then it happened again but now it wont turn on  for 3 days