A dim screen in bios and safe mode

[IbrahimD]

my HP screen is dim in bios mode and safe mode How fix it what diagnostic ?

[VikramTheGreat · Accepted solution]

Hi @IbrahimD,

Welcome to the HP Support Community.
 

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

If your HP laptop screen is dim in BIOS mode and Safe Mode, this usually points to a hardware-level brightness issue or a firmware/driver limitation, since both BIOS and Safe Mode bypass most graphics drivers and power settings.

 Possible Causes and Fixes:

1. BIOS Brightness Limitation

• Some HP laptops default to low brightness in BIOS to conserve power.
• Unfortunately, brightness keys (F2/F3 or Fn+F2/F3) often don’t work in BIOS.
• Fix: Check if your BIOS has a "Panel Brightness" or "Adaptive Brightness" setting:
  • Restart and press F10 to enter BIOS.
  • Look under Advanced > Built-in Device Options or Display Settings.

2. Safe Mode Uses Basic Display Adapter

• In Safe Mode, Windows uses the Microsoft Basic Display Adapter, which doesn’t support full brightness control.
• Fix: Boot into normal mode, then:
  • Update your graphics drivers (Intel/AMD/NVIDIA).
  • Go to Settings > System > Display > Brightness and adjust.

3. Adaptive Brightness or Power Settings

• In normal mode, disable adaptive brightness:
  • Go to Control Panel > Power Options > Change plan settings > Advanced settings
  • Under Display > Enable adaptive brightness, set to Off.

4. Hardware Diagnostics

To rule out a hardware issue:

• Run HP PC Hardware Diagnostics UEFI:
  • Turn off the laptop.
  • Press Esc repeatedly, then F2.
  • Select Component Tests > Display Test.

I hope this helps.

Take care, and have an amazing day!
 

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Regards,

VikramTheGreat