Member Avatar for htdspro

I own an HP laptop, model Pavillion g6. The screen is extremely dim, I can really only see the screen and icons when holding a flashlight to the screen. I connected the laptop to an external monitor, works perfectly, so video card should be ok. Checked all display properties, brightness, etc. Did my research, this is what I have done thus far:
1.Replaced LCD screen with new LCD screen, same result
2.Re-installed old screen again
the laptop do not have any inverter
3.Installed new LCD display cable, same result


    • Could there be an error with the motherboard?
      Is there any display fuse on the laptop motherboard? Not on the LCD!
      ANY HELP/SUGGESTIONS WOULD BE GREATLY APPRECIATED!
  • 2 Contributors
  • 2 Replies
  • 370 Views
  • 2 Days Discussion Span
  • Latest Post Latest Post by htdspro

Dani AI

Generated

Good troubleshooting from and a useful pointer from . The symptom described (a visible image only when illuminated by a light source while external output is fine) very strongly indicates a backlight-power failure on the mainboard rather than a GPU or image-plane fault. With screens and cable already swapped, the next checks should focus on the motherboard backlight circuit: the tiny SMD fuse(s), the LED‑driver/boost stage or its MOSFET, and the backlight‑enable/PWM logic.

Suggested diagnostic steps:

  • Power down, remove AC and battery, and ground against ESD. Visually inspect the area around the display/LVDS (or eDP) connector for a small rectangular SMD fuse (silkscreen usually marked F or FB), burned components, cracked solder joints, or blown capacitors.
  • Test continuity of any nearby SMD fuse with a multimeter. An open fuse is a common, inexpensive fix (replace only with the same rating or exact part).
  • If the fuse is good, boot with the lid open only if comfortable and safe. Measure for a low-voltage “backlight enable” (often a 3.3V logic line) at the panel connector and for the higher-voltage LED-string supply. Presence of BL_EN but absence of the LED supply points to a failed boost/driver or MOSFET. Absence of BL_EN shifts the trace back toward the board logic or BIOS/KB brightness control.

Common remedies are replacing the SMD fuse or the small hinge/daughterboard, swapping the LED‑driver/boost components, or replacing the logic board. Because backlight drivers produce elevated voltages and SMD work demands experience and proper tools, professional repair or sourcing a donor logic board is often the safest, most cost‑effective option. Consulting the Pavilion g6 service manual or parts diagram will provide exact fuse/test‑point IDs before replacing parts.

Recommended Answers

All 2 Replies

Member Avatar for JorgeM

Sounds like it could be a component on the motherboard/power from the motherboard. You did very well with your troubleshooting being able to rule out the screen itself and the video card.

Member Avatar for htdspro

thank you, but do need help on this...

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.