Screen Defect

Green dots on screen NVIDIA

About 3 seconds, full screen, then one question.
White screenBlack screenGrey screenRed screenGreen screenBlue screen
Black screen⛶ Full screen
On whitedark spots, pressure marks, lines
On blackbright dots, backlight bleed, glow
On red, green, bluedead or stuck pixels, colour lines
Fixable

Green dots, sparkles or checkerboard blocks across a monitor screen with an NVIDIA (or AMD) graphics card are artefacts from the graphics card, not the screen: they appear in screenshots, they change with GPU load and temperature, and they follow the card to another monitor.

Test it now

Take a screenshot while the dots are showing: dots in the screenshot = graphics card. Swap the cable and try another monitor or the TV. Watch the GPU temperature; artefacts that start when the card is hot are thermal.

What it is

Green dots, sparkles or checkerboard blocks across a monitor screen with an NVIDIA (or AMD) graphics card are artefacts from the graphics card, not the screen: they appear in screenshots, they change with GPU load and temperature, and they follow the card to another monitor. Causes, in order: an overclock (including a factory one), a bad DisplayPort or HDMI cable, an overheating card, failing video memory. Green dots or sparkles across the whole image with an NVIDIA card are graphics artefacts, not the screen: an overclock, a failing card, a bad cable or an overheating GPU. They appear in screenshots; a screen fault never does.

Can it be fixed?

Overclock: yes, reset to stock. Cable: yes. Overheating: clean the card and case; repaste if old. Failing memory: no — the card is on its way out; replace it while it is still worth something.

What to do

  1. Screenshot: dots present = card, not screen.
  2. Reset any overclock; update the driver cleanly.
  3. New cable; test another display.
  4. Temperatures under load; clean or replace the card.

What a repair costs

United Statesusually more than the monitor is worth — a panel swap starts around $150 and most 24"–27" monitors cost less new
India₹4,000–10,000 for a panel, so a new monitor is often the better buy

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).

Related

Why is there a line on my computer screenA line on a computer screen is either the signal or the panel.Depends — see testBlack spot on monitorA black spot, black dot or dark mark on a monitor or computer screen has the same three causes as on a laptop: dead pixels (a sharp black point or cluster on every colour), a crack in the LCD (a black blot with lines running from it), or pressure damage from something pressing the panel (a soft dark smudge on white).Not fixable — new panelBlack dot on computer screenA black dot on a computer screen that shows on white and vanishes on black is inside the panel: a cluster of dead pixels (a sharp-edged tiny square), a pressure mark (soft-edged, where something pressed the panel), or dirt under the glass (moves if you press gently, on tablets and monitors only).Depends — see test