Problem with brightness when I open my laptop (plugged or unplugged)

[angie001_]

I am writing to request assistance with a persistent display brightness issue on my OMEN 17t-an100 CTO/1070. The screen has been consistently dim on startup, and this problem has been present both when the laptop is running on battery and when it is plugged into the AC adapter.

​The issue began after I received a "CMOS is invalid" error, which was subsequently resolved by the system's automatic BIOS reset. Shortly after, I also replaced the laptop's main battery. While the laptop now functions, the screen brightness problem remains. I have since confirmed that the brightness issue was also present before the new battery was installed.

​Here is some key system information:

• ​Product Name: OMEN 17t-an100 CTO
• ​BIOS Version: F.19
• ​System Board ID: 845A

​I have performed a number of troubleshooting steps to diagnose and resolve this issue, but the problem persists. Here is a detailed list of the steps taken:

• ​Driver and Software Troubleshooting:
  • ​I performed a clean installation of the NVIDIA graphics driver, reverting to an older, known-stable version to rule out a driver bug.
  • ​I checked and adjusted the power management settings within the NVIDIA Control Panel.
  • ​I confirmed that there are no HP-specific power management applications installed on the system, such as HP Power Manager or OMEN Gaming Hub.
  • ​I have verified that all Windows power settings are set for optimal performance and that "adaptive brightness" is not an available option.
• ​BIOS and Hardware Diagnostics:
  • ​The BIOS was reset to its factory default settings following the initial "CMOS invalid" error.
  • ​I confirmed that the brightness issue persists even when viewing the BIOS Setup Utility menu, ruling out a Windows-level software problem.
  • ​I ran the HP PC Hardware Diagnostics UEFI tool. Both the AC Adapter Test and the Battery Test passed without any errors.

​The most critical finding from my troubleshooting is that the screen's brightness is low even when the system is operating within the BIOS and diagnostic menus. This indicates that the problem is not related to the Windows operating system or its drivers.

​Based on these results, I believe the issue is either a hard-coded power management setting within the BIOS that cannot be changed through the standard menus or a physical hardware fault with the display itself.

​Could you please provide guidance on the next steps I should take? I would like to know if there is a known fix for this issue or if a professional repair is necessary.

​Thank you for your time and assistance.

[zoey7886]

@angie001_, Welcome to the HP Support Community!  

Thanks for reaching out about your query regarding Display Brightness Issues on HP OMEN Laptop! 

We're thrilled to have the opportunity to assist you and provide a solution.  

A persistent display brightness issue on your HP OMEN 17t-an100 CTO can be frustrating. Here are some steps that can help resolve the problem:

Check the Brightness Settings:

• Ensure your brightness settings are correctly configured. You can adjust brightness through the Windows settings by navigating to Settings > System > Display.

Update Graphics Drivers:

• Outdated graphics drivers can cause display issues. You can update your graphics drivers using HP Support Assistant or by downloading the latest drivers from HP's official website.

Check Power Settings:

• Sometimes, power saving modes can affect screen brightness. Go to Control Panel > Power Options and ensure that your settings allow for optimal screen brightness.

BIOS and Firmware Update:

• Since the issue began following a BIOS reset, ensure your BIOS is updated to the latest version. You can download BIOS updates from HP's support page specific to your laptop model.

Check Keyboard Shortcuts:

• On some laptops, you can control screen brightness using function keys. Look for brightness settings on your keyboard shortcuts (typically, Fn key combined with F-key functions on the top row).

Perform a Hard Reset:

• A hard reset can sometimes resolve system configuration issues. Turn off your laptop, remove the power adapter and battery (if removable), hold down the power button for about 15 seconds, then restart the laptop.

Reset Control Panel Settings:

• Verify settings like refresh rate and resolution under Control Panel > Display > Display Settings.  

Hope this helps! 

Take care, and have an amazing day!  

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