Most common causes for screen defects are:

1. Bad LCD cable 

• Loose LVDS / eDP cable

• Damaged cable shielding

• Pin not making contact

• Cable bent near hinge / stand

✅ Symptoms

• Colored band / lines

• Only part of screen affected

• Appears even in BIOS

• Changes when you move cable / tilt screen

✔ Fix
Reseat or replace LCD cable.

2. Panel damage 

• Bottom line driver failure

• Panel timing IC issue

• Pressure damage

✅ Symptoms

• Always same area (like your bottom strip)

• Same color every boot

• Does not change with cable movement

✔ Fix
Replace LCD panel.

3. Wrong resolution / panel timing / EDID issue 

If BIOS framebuffer resolution doesn't match panel native resolution, you can see:

• Pink bar

• Green lines

• Offset image

Common when:

• Custom panel used

• Different vendor screen installed

• BIOS not configured for that panel

✔ Fix

• Check BIOS display settings (if available)

• Update BIOS

• Check panel EDID / timing config

4. GPU / RAM issue (less likely but possible)

If integrated GPU memory is bad, artifacts can appear even in BIOS.

Signs:

• Random colors

• Flickering

• Changes every boot

Try:

• Reseat RAM

• Test with different RAM stick

5. Power / panel voltage issue (seen on POS terminals)

Bad 12V / 5V rail → panel driver glitch

Check:

• PSU

• DC board

• Panel power cable

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Quick Tests You Can Do

1. Connect external monitor (HDMI).

• If external monitor is perfect → LCD panel or cable issue.

• If external monitor also has pink band → motherboard / GPU issue.

2. Enter BIOS and leave it there

• If the band is still there in BIOS, it's definitely hardware.

3. Lightly move the screen / cable

• If the color changes → cable issue.

If none of the above fixes the issue, please contact our support team for further repair / warranty instructions