How much does it cost to repair?

US: usually 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.

Computer screen problems

White screen Black screen Grey screen Red screen Green screen Blue screen

White screen⛶ Full screen

On whitedark spots, pressure marks, lines

On blackbright dots, backlight bleed, glow

On red, green, bluedead or stuck pixels, colour lines

Depends — see test

Computer screen problems fall into a short list, and each one has its own page: a black or white spot (pixels, pressure, backlight), a line (panel connector, cable, or graphics), a colour cast (settings or panel ageing), flicker (settings, cable, or connector), burn-in ghosts (OLED ageing), a blurry image (settings), half the screen blank (panel driver), or touch that stops responding in one area (digitiser).

Test it now

Full-screen white, black and grey, then the three colours. Note what you see, on which colours, and whether it changes with pressure. Then answer the questions on the home page, or pick the matching symptom from the list below.

What it is

Can it be fixed?

Settings and software faults: yes. Cables and connectors: usually, as a small repair. Panel faults: replacement. The pages linked below say which is which for each symptom.

What to do

Full-screen colours.
Screenshot: fault in the screenshot = software or graphics, not the screen.
Match the symptom to a page below.
In warranty and no impact or pressure: claim before paying.

What a repair costs

United States	usually 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).

Every monitor symptom

Why is there a line on my computer screenA line on a computer screen is either the signal or the panel.Depends — see test Black 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 panel Black 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 Black mark on computer screenA black mark 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 Black spot on computer screenA black spot 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 Bottom of computer screen flickeringA flickering computer screen is the signal, the refresh rate or the backlight.Fixable Green dots on screen NVIDIAGreen 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.Fixable Horizontal line in monitor screenHorizontal lines on a monitor screen are either the signal or the panel.Depends — see test Computer screen blurryA blurry computer screen is a settings problem far more often than a hardware one.Fixable Dark shadow on computer screenA dark shadow or shaded area on a computer screen — larger than a spot, with soft edges — is one of three things: a pressure bruise where the panel was squeezed (a bag, a thumb, a case), a backlight fault (LCD: a failing LED string or a slipped diffuser sheet leaves a dim band), or burn-in of a dark app area (OLED).Depends — see test Monitor screen blurryA blurry monitor screen is a settings problem far more often than a hardware one.Fixable Lines on PC screenA line on a monitor screen is either the signal or the panel.Depends — see test