Laptop screen remains black after boot up.

[DodgerDad25]

I received purchased laptop and opened it.  The display only worked for about 10 minutes before it stayed black.  I can barely see the screen if I hold laptop against a light of tilt it at an extreme angle.  The steps I took included.

* Hard reboot

* Another reboot with the battery unplugged (battery is not removable)

* Checked my F2 / F3 dimming settings

* Plugged the laptop in an HDMI external monitor.  The external monitor worked for a bit, then wouldn't recognize the input.

* Plugged the laptop in another HDMI external monitor (my flatscreen TV) it currently is working, but the laptop screen is still black.

* Checked the f11 (Screen switch for extend, duplicate, screen).  Still not working.

* Installed BIOS updates and recommended video drivers from HP support.

* Checked the Device Manager and Display adapters - using current drivers.

* Reviewed the HP Support Community for similar problems.

My assumption is that it might be the back light?  But the community responses were to remove the backlight timeout in BIOS.  Or check the display hardware thru opening the laptop.  This was NOT recommended by HP Support and I agree.  I don't have that skill set.

[VikramTheGreat]

Hi @DodgerDad25,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

Thanks for the detailed steps. Based on your description and the troubleshooting you've already done, it strongly suggests a backlight failure on your HP 17 Laptop PC 17-cp3000 (B03B8AV). Here's a breakdown of what’s happening and what you can do next:

What You Can Do Next

1. Perform a Full Power Reset

You’ve done a partial reset, but try this full version:

1. Shut down the laptop.
2. Unplug the charger.
3. Press and hold the power button for 60 seconds.
4. Plug the charger back in and power on.

2. Check for Display Brightness Lock

• Press Fn + F3 repeatedly to increase brightness.
• Also, try Windows + Ctrl + Shift + B to reset the graphics driver.

 3. Run HP Display Diagnostics

If you can get the external monitor working again:

• Download and run the HP PC Hardware Diagnostics for Windows: 👉 HP PC Hardware Diagnostics | HP® Support

I hope this helps.

Take care, and have an amazing day!
 

Did we resolve the issue? If yes, please consider marking this post as "Accepted Solution" and click "Yes" to give us a helpful vote - your feedback keeps us going!

Regards,

VikramTheGreat

[DodgerDad25 · Accepted solution]

Thanks for the reply.

I ended up sending the laptop back to Amazon and the third party seller.  Before I did, I had tried a few of the suggestions below.

* Full Power Reset - did not try.

* Fn +F3 - Tried it.  No improvement.

* Windows + Ctrl + Shift + B to reset the graphics driver. - Tried it.  But it seemed to deactivate my external monitor and HDMI cord.   I had to run another HDMI cord from the laptop to my big screen TV.  Sorry kids, no TV while Dad is fixing the computer. 

*  HP PC Hardware Diagnostics for Windows - Yes, tried it. I ran the general tests, and the detailed tests.   All tests came back as passed.  So no luck there.

[VikramTheGreat]

Hi @DodgerDad25,

Thank you for your response,

Is there anything else that I can help you with today?

Please click “Accepted Solution” if you feel my post solved your issue, as it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

Take care and have a great day ahead!

VikramTheGreat

HP Support