Screen problem guides
The tools on this site show you what a screen is doing. These guides explain what it means and what to do next. Each one is written to help you tell a fault you can fix from a fault you cannot, before you spend money or start a warranty claim.
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How to fix dead pixels (and when you cannot)
A dead pixel cannot be fixed by software and a stuck pixel sometimes can. How to tell them apart, what works, and which technique will damage your panel.
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How to clean a monitor without damaging it
Screen coatings are softer than the glass under them. The three minute method that removes everything without stripping an anti reflective layer or leaving streaks.
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White spots on a laptop screen
Almost always pressure damage to the backlight diffuser rather than dead pixels. How to tell which you have, and what can actually be done about it.
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White dot or spot on a phone screen
Four common causes, from a stuck pixel to trapped moisture, and only one of them responds to anything you can do at home. The one minute test that separates them.
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White spot on a MacBook screen
Anti reflective coating wear and diffuser pressure marks look similar and need completely different responses. Shine a torch across it before deciding.
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Chromebook white screen of death
A blank white Chromebook is nearly always software, not a broken display. The hard reset, the recovery image and the panel check, in the order that fixes most cases first.
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A vertical line running down your screen
Not a row of pixels that all failed at once. A failed driver channel or a damaged cable, and the five minute test that tells you which.
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OLED burn in, checking for it and avoiding it
Uneven pixel ageing rather than a stuck image. How to check a panel with solid colour fields, and what genuinely slows it down.