A dead laptop is something you need to apply several methods to make it working again. Actually there are a series of troubleshoots you need to try. Some of them are here in the chronology.
Check your Battery Health
Disconnect any External Devices Connected To Your Laptop
Remove and re-insert your Laptop RAM
Hard reset your laptop
Replace CMOS battery
This post was extracted from https://somnio360.com/hp-laptop-wont-turn-on/
However, there might be a dead motherboard or power adapter issue. It is recommended to try with some alternate adapter before you rush to the service centre.