Laptop wont boot after battery change.

I just replaced my battery, and the laptop wont boot.

Details:

-Model G752vy

-The power red light remains on, unless I unplug the battery and the AC cord.

-I tried to unplug both and press the on button for a minute. It didnt help.

-There is no noise when I try turn the laptop on + fans won’t start (checked visually)

-All internal cables seem to be well connected

-Checked Fun+F7 key combination. It didnt help

-Wont boot with our without battery pluged (i.e. only AC cord pluged)