Question system doesn't "boot" unless I remove cmos battery

[Alquist]

the reason I said "boot" is that it doesn't properly boot even without the cmos battery, but atleast it lets me to get into windows somehow after a lot of pain. Yesterday when I turned on the pc it wasn't giving any image and it was kind of boot looping, it flashes the power led 2 times with 2 to 3 sec delay and fans and all start running but power led turns on with a slight delay after the components start running , that delay is 4 sec. Then after waiting 4 minutes (system might reboot in that time or not) it shows a screen where it says CMOS settings wrong because I took out the cmos battery (it won't even get to there without taking it out) then I got into bios reconfigure it and save. after saving it still takes more than the normal time it needs to boot into windows and if I turn off the pc I have to go through the same cycle again in order to use the pc.

Things I tried:
change CMOS battery
clear CMOS
update BIOS
try RAM sticks one by one on each slot
try 3 different PSUs
try booting without any peripherals

And none of these solved the problem so the last thing I didn't try is a new mobo and cpu, but because I'am able to boot into windows and use it I don't think its something related to cpu, I even tried to game for a while but got BSOD eventually.

BIOS Version/Date: American Megatrends Inc. 4.6.5, 21.05.2015
CPU: I5-4460
CPU cooler: AeroCool low profile
Motherboard:ECS H81H3-M4 V1.0A
Ram: Muhskin 8gb 1333mhz, Kingston 8gb 1600 (set to 1333 to work with the other one)
SSD/HDD: PNY 240Gb SSD
GPU: N/A
PSU: ASUS ATX 500H 500W [age unknown] , other two: Cooler Master MWE White 500W [2 year old] , L&C 235W [age unknown]
Chassis: Zalman T6
OS: Windows 10 Pro
Monitor: LG Flatron 20en33

 

[Lutfij]

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

try 3 different PSUs
You should include all makes and models of the PSU's you've used to troubleshoot the system with. If they're used, include their ages.

 

[Alquist]

Update: I am dumb, it was a faulty case power on switch, turned the PC on with a screwdriver and nothing is wrong for now... I will update if something goes wrong again.