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LWRepairs Laptop Screen Troubleshooter
Follow the steps to diagnose the exact screen issue.

What would you like to do?

Diagnose Screen Issues Diagnose Screen Issues
Find My Laptop Model Find My Laptop Model

What problem is happening with the laptop screen?

Cracked / Physical Damage
Lines on Screen
Flickering Screen
Dark / Dim Screen
White Screen
Wrong Colours / Tint
Backlight Bleeding
Ghosting
Dead Pixels
Colour Calibration Issues
Screen Tearing
Image Artifacts
No Image but Laptop On
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Find Your Laptop Screen Model

To identify your laptop screen model number, check the back of the display for stickers showing the manufacturer and model. Sometimes tools like HWINFO help, but usually you need to remove the screen.

Steps to find your screen model:

  1. Locate the sticker on the back of the LCD panel.
  2. Identify the manufacturer code: for example, AU Optronics screens start with "B", LG screens start with "LP".
  3. The screen model will start with the manufacturer code, followed by a 3-digit screen size code. For example, an 11.6" AUO screen will start with B116, an 11.6" LG screen will start with LP116.

Popular LCD brands:

  • AU Optronics (AUO): Bxxx
  • BoeHydis / Hyundai BOE: NVxxx, NExxx, NTxxx, HTxxx
  • Innolux / CHIMEI: Nxxx
  • CSOT: MNxxxxxxx-x, MCxxxxx
  • HKC: MBxxx, MCxxx
  • IVO: Mxxx-Rx, Rxxx-Rx, Xxxx-Rx
  • JDI: Jxxx, LPMxxx
  • LG Display: LPxxx
  • Panda: LMxxx, LCxxx
  • Samsung: LTNxxxx, ATNxxxx
  • Sharp: LQxxx
  • Tianma: TLxxxxxx, TVxxxxxx

Many laptops have their own manufacturer part codes; check the sticker carefully for both the laptop part number and the LCD panel number.

Full Guide
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Cracked / Physically Damaged Screen

  • Display panel is physically broken.
  • Impact or pressure damage.
  • Screen replacement required.
Book Screen Replacement
Staff only: Toggle details
  1. Inspect panel for cracks or ink bleed.
  2. Check bezel, hinges, frame.
  3. Confirm touch layer functionality.
  4. Test external monitor for GPU check.
  5. Document panel model number.
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Lines on Screen

  • Static lines: loose or damaged cable.
  • Moving lines: cable or GPU issue.
Book Diagnostic
Staff only: Toggle details
  1. Test external monitor.
  2. Reconnect LVDS/eDP cable.
  3. Check hinge tension.
  4. Enter BIOS to check persistence.
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Flickering Screen

  • Driver / refresh rate issues.
  • Backlight problems.
  • Loose cable.
Book Diagnostic
Staff only: Toggle details
  1. Change refresh rate.
  2. Boot Safe Mode/BIOS.
  3. Reinstall drivers.
  4. Test external display.
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Dark / Dim Screen

  • Backlight failure.
  • Motherboard fuse issue.
  • Cable damage.
Book Backlight Repair
Staff only: Toggle details
  1. Check brightness settings.
  2. Use torch to check LCD image.
  3. Confirm panel type and replacement options.
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White Screen

  • Loose or damaged cable.
  • GPU / motherboard issue.
  • LCD panel failure.
Book Repair
Staff only: Toggle details
  1. Check LVDS/eDP cable and motherboard pins.
  2. Test external monitor.
  3. Boot BIOS / Safe Mode.
  4. Swap screen or cable.
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Wrong Colours / Tint

  • Calibration needed.
  • Loose cable or panel fault.
Book Repair
Staff only: Toggle details
  1. Check Windows calibration.
  2. Inspect LVDS cable.
  3. Test tint changes with lid movement.
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Backlight Bleeding

  • Panel pressure.
  • Manufacturing defect.
  • Hinge torque issue.
Book Repair
Staff only: Toggle details
  1. Test black screen at 100% brightness.
  2. Inspect pressure points and hinges.
  3. Replace panel if persists.
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Ghosting / Image Trails

  • Slow response panel or cable issue.
  • GPU rendering problem.
Book Diagnostic
Staff only: Toggle details
  1. Test on external monitor.
  2. Check display cable.
  3. Update GPU drivers.
  4. Replace panel if persists.
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Dead Pixels

  • Permanently stuck pixels.
  • Minor clusters may be tolerated.
  • Panel replacement if severe.
Book Repair
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Colour Calibration Issues

  • Incorrect colour profiles.
  • Calibration needed via software.
Book Calibration
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Screen Tearing

  • Usually GPU or driver related.
  • VSync or refresh rate adjustment may help.
Book Diagnostic
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Image Artifacts

  • Distorted shapes or colours.
  • Could be GPU or panel issue.
Book Diagnostic
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No Image but Laptop Is On

  • Backlight or LCD panel failure.
  • Check display cable.
Book Repair
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