Vertical or Horizontal Lines on Screen

An image reaches the panel as orderly rows and columns of data, each driven by tiny conductors along the edges of the glass. When one of those conductors loses contact, an entire line of pixels stops receiving its instructions and freezes as a fixed streak. The break may be a hairline fracture in the panel, a connection working loose at the ribbon, or corrupted data leaving the graphics chip. Because the fault is in the wiring of the image rather than its content, the line stays put no matter what is displayed.

• Thin colored or black lines run vertically or horizontally
• The lines stay fixed regardless of what is on screen
• They shift or multiply when pressure is applied near the panel
• Whole bands of the image may distort or disappear

• 1A loose or damaged display cable disrupting part of the signal
• 2A failing panel with internal connection breaks
• 3A graphics chip fault sending corrupted image data
• 4Physical pressure or impact damage to the screen
• 5A driver fault occasionally producing artifacts

• Note whether the lines persist across every image and screen
• Observe if gentle pressure near the panel changes them
• Watch whether an external monitor shows a clean picture
• Consider whether the lines followed a knock or drop
• Notice if the pattern stays identical from the moment of power-on

1. 1

   Compare with an external screen

   Connect another monitor; a clean external picture points the fault at the built-in panel or its cable rather than the graphics chip.

2. 2

   Check for impact damage

   Look for cracks or pressure marks and note whether the lines followed a knock, since physical damage shows as fixed streaks.

3. 3

   Power down before handling

   Shut the device off and disconnect power before opening anything to examine the display cable, so the work stays safe.

4. 4

   Reseat the display cable

   If you can reach it, gently unplug and firmly reconnect the panel's ribbon, as a loose link can drop a line of pixels; the connector is fragile.

5. 5

   Close everything back up

   Refit any panel or cover removed for access before powering the device on again.

6. 6

   Check the lines are gone

   Power on and confirm the streaks no longer appear across changing images and colours.

Lines that stem from physical stress are easier to avoid than to mend, so handle the screen as the fragile glass it is. Carry a laptop closed and supported from underneath rather than by the lid, and never set objects on top of a folded machine. Avoid pressing or wiping the surface firmly, and clean with a soft cloth and the lightest touch. Cushion the device during transport, keep it clear of edges where it might be knocked, and let it acclimatise gently if it has been somewhere very cold.