MacBook Pro only turns on when I connect the charger without battery

Hi, the mac was always with me, and i never spilled anything on it. Although this happened in my mothers house where there is more humidity. Are they unrelated? they all happened on the same time. no display, no keyboard and no trackpad. doesn't run of battery(shuts down when unplugged) even tough it charges the battery.

When i connected the charger while pressing the power button the fans were running on high speed and the display works. from my noob perspective it seams that it's not getting enough power to the display / trackpad / and keyboard somehow.

In a way everything is related on a logic board one way or the other through the main ICs, but such a number of failures at once with no external damage it's very unusual indeed in my experience. If everything works with SMC bypassing, as you do when plugging in Magsafe with power button pressed points to an SMC failure, which would require a board level repair or replacement. Having been in a somewhat humid environment let's assume that's the reason of the failure. I'd try letting the Macbook run for some time in SMC bypass mode..if humidity managed to condense in the board let's say an hour running time should dispose of any humidity residues for sure. You may try also a hair dryer blowing warm air until the board feels warm at touch.Other than that I wouldn't know how to help without indepth testing.

thx for the help. i tried with the blower and didn't work, wasn't expecting to work since i have been using it like a desktop for the last days and i assume that it would dry .