I understand you have issues turning on your laptop.
Don't worry I'll try to help you out.
Did you make any software or hardware changes on your PC?
Have you tried checking with a different adapter?
Please provide the product number of your PC to assist you better.
Try the steps recommended below.
To test your AC adapter, use the following steps:
Confirm the AC power adapter is a genuine HP part. Do not use a non-HP AC power adapter on an HP computer.
Determine the adapter wattage by looking near the bottom of the adapter.
Using an AC power adapter with a lower wattage than the computer requires can cause issues. For example, the CPU clock rate might be reduced to save power, which might cause programs to run slower or the AC power adapter to become warm to the touch.
Check the AC power adapter for damage, including wires and pins. Damaged components, like the AC adapter or the pin in the power connector, might require an HP-certified repair.
If the AC power adapter is not damaged, continue using these steps.
Verify the wall outlet is functioning properly (do not use a power strip, surge protector, or secondary power source). To do this, plug a lamp or device you know to be working into the same wall outlet you plan to use the AC power adapter. If the lamp or other device works, you know the wall outlet is working correctly. If the lamp or device does not work, keep testing wall outlets until you find one that works.
Once you have found your functioning wall outlet, plug your AC power adapter into it and try starting your computer. If the computer does not start, continue using these steps.
If you have access to a different AC power adapter or power pack that is designed for the computer, connect it to the computer and try to start the computer. If you own, or have access to, more than one computer, verify that you are using the correct AC power adapter.
Use a power adapter that meets the power requirements and has the correct type of connector to avoid damaging the computer (on newer notebook models, connecting the wrong adapter to the notebook might cause the power LED lights to blink but not power on the computer).
If the computer does not start, continue using these steps.
Remove the power cord from the AC power adapter for approximately 5-10 seconds, then reconnect the power cord to the AC power adapter, making sure the AC cable is fitted tightly into the AC power adapter inlet.
Verify all cords and connectors are secure between the power cord, AC power adapter, and computer.
Try to start the computer. If the computer does not turn on, continue using these steps.
A discharged or defective battery might prevent the AC power adapter from supplying enough power to start the computer.
To test this, remove the notebook battery, connect the AC power adapter, then turn on the computer (you can also try these steps with an alternate AC power adapter that has the correct wattage and connector).
Refer this article to further troubleshoot no power issues with the laptop.
If the issue still persists after trying out the steps, please contact HP support and get the service options.