lap top

Do you mean the notebook screen actually keeps popping out???
otherwise, please specify the exact problem with much more detail, we cannot read minds from such distances.

What model of HP Laptop?
Are you running on battery power, docking station or straight to A/C outlet?
By 'popping', do you mean it is making a popping sound when loosing power?
Or... is the laptop intermittently shutting down after running for a period of time?
If that is the case, how long does it run before it shuts down?

Remember... the more detailed information you provide, the better chance you have of someone coming up with a solution.