Thinkpad x260 not turning on

when putting on charge the power button blinks as usual, when I turn on the laptop with/without the battery/power the power button lights up and the small orange light on the f1 and f4 and the fn key blinks for 1-2 sec and also the fan spins for like 2-3 seconds, nothing else happens, no display no nothing ( i think there was like a shimer of black light change on the display )

when i hold the power button for like 2 sec it lights off,

I first tried without a ram so it beeped, after putting on the ram the above happens,

i tried unplugging the internal display cable to see any change, but it is still the same, as above,

but the interesting thing is that if i unplug the mic/camera cable from the board, the thing won't even light up , nothing,

that's all the diagnostics i could do,

i also did the power test with removing the battery and stuff and holding the button for like 1min , there was still no change,

i also tried unplugging the cmos and attaching it after sometime, still the same,

i also tried connecting an external hdmi, monitor still there is no signal there,