if your laptop comes with removable battery means , remove it. and keep the battery in sunlight for 2 minutes .
remove all external connectors .
press and hold the power button for 60 seconds and then release.
insert the battery into laptop.
connect the CHARGER , and see if it charging or not . if charging means , leave for 20 minutes.
now power on , see if it powers on or not
it does not power on means , then remove newly added ram module , then try to switch on again