Pavilion 14 doesn't boot, black screen

[Lucia43]

Hello,

Yesterday night when I tried to turn on my laptop, the power led was on, the fans were turning, but the screen stayed black. I forced it to shut down. I tried to turn it on again and it did turn on, I logged in and then it froze completely so I forced it again to shut down. I tried to turn it on a third time, but again the power led was on, the fans were turning, but the screen stayed black. It has been like this since yesterday. I tried the cold hard reset, holding the power button for 2 minutes then turn it on again, I tried to connect to an external screen and all of this several times without success. The charging led is working, all the other leds aren't. I think I can hear the hard disk turning as well. Any advice will be very much appreciated, thank you.

(Pavilion 14, Windows 10 Home)

[Max3Aj]

@Lucia43, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
I understand how frustrating it must be when your HP Pavilion 14-dv0000 won’t boot and only shows a black screen. Based on your description, it sounds like the system is powering on but not completing POST (Power-On Self-Test), which could be due to a hardware or firmware issue. Let’s go through a few steps to try and resolve this:

Perform a Hard Reset (again, with battery and peripherals removed)

Since you’ve already tried a cold reset, let’s ensure it’s done with all peripherals disconnected:

• Disconnect the AC adapter.
• Remove any USB devices, SD cards, or external displays.
• If your model has a removable battery, take it out.
• Press and hold the Power button for 15–20 seconds.
• Reconnect only the AC adapter and try powering on.

Try a BIOS Recovery

Sometimes the BIOS may become corrupted. HP laptops support a BIOS recovery feature:

• Turn off the laptop completely.
• Press and hold Windows + B keys, then press and hold the Power button for 2–3 seconds.
• Release the Power button but continue holding Windows + B for another 5–10 seconds.
• If successful, you should see the BIOS recovery screen.

Check with an External Monitor (again)

You mentioned trying this, but just to confirm:

• Connect an external monitor via HDMI.
• Power on the laptop and press F4 or Windows + P to toggle display modes.
• If the external screen works, the issue may be with the laptop’s display or display cable.

Perform a Component Test via HP Hardware Diagnostics (if accessible)

If you can get any display at all:

• Turn off the laptop.
• Turn it on and immediately press Esc repeatedly, then F2 to enter HP PC Hardware Diagnostics.
• Run the System Tests and Component Tests (especially for memory and hard drive).

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support