Laptop screen not turning on

[Jix]

My device is a omen 16 (16-n0345AX) and its turning on but display is not working whatsoever and till yesterday it used to turn on but screen waa filled with lines and was jittery but now its not even working. Laptop is turning on but display is black

[bonnie5689]

It sounds like your HP Omen 16 (16-n0345AX) is facing hardware issues related to the display. Since the problem started with a jittery, lined screen and has now progressed to a completely black display, this could be due to several potential causes:

Loose or damaged display connections: Over time, the internal cables connecting the display to the motherboard can loosen or get damaged, especially if the laptop has been dropped or moved around frequently.

Graphics card issues: The dedicated GPU (in this case, likely an AMD Radeon or NVIDIA GPU) could be failing or malfunctioning. This could explain the initial screen distortion.

Faulty display panel: If the panel itself is damaged, it could result in the display behaving erratically before completely blacking out.

Driver or software issues: Though less likely in this case, outdated or corrupted graphics drivers could cause display problems. Since the laptop is turning on, but the screen is black, it's hard to rule this out without external diagnostics.

Motherboard or GPU failure: If the GPU or another critical component on the motherboard has failed, the laptop might still power on but not display anything.

Troubleshooting Steps:
Test with an external monitor:

Connect your laptop to an external monitor using an HDMI or DisplayPort cable. If the external monitor works, this suggests the problem lies with the laptop's display or its internal connections, rather than the GPU or motherboard.
Reset the laptop:

Turn off the laptop, disconnect all peripherals, and perform a hard reset by pressing and holding the power button for 15–20 seconds. Then, turn it on again and check if the display works.
Check for keyboard shortcuts:

Some laptops have a function key (e.g., Fn + F4) that toggles between display modes (laptop display, external monitor, both). Try pressing this to see if the display comes back.
Inspect for any external damage:

Look closely for any visible physical damage to the screen or hinges that might have caused internal cable issues.
Check for POST beeps or lights:

Pay attention to any beep codes or flashing indicator lights when you turn on the laptop. These can provide clues if there's a hardware failure.
Access BIOS:

If possible, try accessing the BIOS by pressing F10 (or the key for your model) during startup. If the BIOS screen appears but Windows doesn't, the issue might be with the OS or graphics drivers.
If none of these steps resolve the issue, it may require professional service. Since the device is still under warranty, as per your earlier inquiries, I would recommend reaching out to HP support for warranty repair or replacement if necessary. If the display or GPU is failing, it's likely a hardware issue that they can address.