Hello, my name is*****'m going to answer this to the best of my ability and knowledge, and I've been a PC and IT tech for 15 years.
If you have reseated the battery, checked the outlet, checked the power cord, and it still won't power on, then it may have fried the I/O board on your laptop.
If you'd like, I can walk you through a few steps to make sure.
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Disconnect the AC power and Remove the battery. Hold down the power button on the laptop for one minute. Then release button, connect the battery and AC power. Now try to power ON. Let me know the result.
If you did all the test it is a hardware issue. Most probably the power supply inside the system or the motherboard damaged.
I understand that this answer may not be entirely to your liking, and I regret being the bearer of information that you really don’t want to hear. But it would be unfair to you and unprofessional of me where I to provide you with anything less than truthful and honest information.