Laptop screen blackout suddenly

[DingKang]

I am using an external monitor together with a laptop monitor. My laptop will blackout and will not respond to any clicks while the external monitor still on and youtube running but uncontrollable. I tried everything but only force restart by holding power button works. Noting that I have the latest update and Bios on my laptop.

[Echo_Lake]

@DingKang

Thank you for posting on the HP Support Community.

Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:

• Did this happen after a recent window or software update?
• Have you made any hardware/software changes?
• Did you make any changes on the settings of your PC prior to the issue?
• When was the last time it worked fine?

While you respond to that, let's try these steps: 
Perform Windows Update and HP Support Assistant in order to install the latest graphic and chipset drivers: (do not skip any troubleshooting steps if you feel steps are repeating) 

To check for updates now, select the Start button, and then go to Settings  > Update & security  > Windows Update, and select Check for updates.

Install updates from HP Support Assistant: Go to Download HP Support Assistant to install the tool.

1. To open HP Support Assistant, double-click the HP Support Assistant icon .
2. Click My devices in the top menu, and then click Updates in the PC or My notebook pane.
3. Click Check for updates and messages to scan for new updates.
4. Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
5. Click the update name for a description, version number, and file size.
6. Select the box next to any updates you want to install, and then click Download and install.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

[DingKang]

No changes in settings.

I dont know exactly if it is after any update but his issue occurred first 3 weeks ago where i first got an external monitor

[Echo_Lake]

@DingKang

Thank you for posting back. 

Have you tried the suggested troubleshooting steps?

Is everything working fine, or would you require any further assistance? 

System Restore returns your computer to the files and settings from the restore point. Your personal files and documents are not affected. You can also undo a System Restore if the restore does not resolve the issue or if the issue becomes worse.

Click here: https://support.hp.com/in-en/document/c03327545

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.