1) is there any lights on the laptop when you plug in the charger and or try to turn it on?
2) can you hear the fan or any internal components when you do try and turn it on?
NO Light and no fan movement
Could be as simple as a dead power brick. Try another one.
If that doesn't work then you may be looking at a motherboard swap as the power circuitry, which may have failed, or the power connector, which may have broken loose, isn't separately replaceable or easily repaired without the proper equipment and technique.