Thinkpad t450s not powering on (fan spins for 5 sec than turns off)

When i connect power cable fan spins for around 5 sec then turns off. (power button flashes 3 times I think that means that power cable is connected) .

Here's what I've tried:

- holding power button for 30 sec.

-disconnecting and reconnecting external and builtin battery

-pressing reset swich

-disconnecting and reconnecting CMOS battery

-messuring voltages, I messured 3v3, and 5v just fine, but when fans stops spinning voltages on cappacitors also go to 0v. Im new to board repairing so i don't know what to messure next, if anybody has any ideas i would be thankfull.