Once you plug the computer into power outlet, do you press the power-on button after that ?
Unplug the device from power source and remove the battery [in the attached PDF file below you will find instructions how to remove the battery]
Re-insert back the battery and try to start the device
If the above did not help, review the HP official troubleshooting guide (using HP Virtual Agent) about such issues you experience now. Follow the appropriate agent's steps that fit your case to attempt to fix the issue:
** I am an HP employee *** I express personal opinion only *** My location: Europe *** HP Expert - Volunteer ** Click below on Accept As Solution and ThumbUp+ buttons if my comments helped or to say thanks.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".