Black line on laptop screen
A line pattern shows a missing or extra row instantly; the colour tiles below show whether it is on every colour.
Plain colours, full screen:
A black line on a laptop screen comes from one of three places, and the test tells them apart.
Test it now
Full-screen white, then black, then the colours: a panel line is fixed and identical on all of them. Tilt the lid slowly from 45° to 120° — a cable line changes or disappears. Plug in an external monitor or TV: if the lines are there too, it is the graphics chip or driver. Take a screenshot: a line in the screenshot is never the screen.
What it is
A black line on a laptop screen comes from one of three places, and the test tells them apart. Lines that change when you tilt the lid: the display cable through the hinge. Lines that are also on an external monitor or in a screenshot: the graphics chip or driver, not the screen. Lines that are fixed, identical on every colour, and only on the built-in screen: the panel.
Can it be fixed?
Cable: yes, a small repair (the cable is a ₹500–1,500 part in India, $20–40 in the US, plus labour). Graphics driver: yes, free — update, or roll back. Panel: no, replace the panel. Graphics chip hardware: usually a motherboard, and on a laptop that decides whether it is worth it.
What to do
- Screenshot and external monitor first: lines on both = graphics driver or chip.
- Lid tilt: changes = cable; a small repair.
- Fixed on every colour, only on the built-in screen: panel quote.
- In warranty and no drop or pressure: claim it — lines are a covered panel fault.
What a repair costs
| United States | $100–300 for a new panel (parts $50–150 plus labour); budget and 1080p panels at the low end, touch and high-refresh panels at the high end |
|---|---|
| India | ₹3,000–8,000 for a new panel at an independent repair shop; ₹6,000–15,000 at the brand service centre |
Typical ranges from repair-shop and manufacturer price lists, 2026-09-06. Get two quotes; prices vary by model and city.
Warranty
Most makers replace a panel under warranty for physical panel faults that are not accidental damage; pressure marks, cracks and liquid damage are treated as accidental and are not covered. For dead pixels, each brand has a threshold (typically 3–5 bright or 5–8 dark pixels on a laptop; Dell's premium-panel guarantee replaces at one bright pixel).