Guides
Practical answers to the questions people actually search for about screens: what a white spot means, how to clean a monitor, and how to test for dead pixels. Written from real keyword research, not generic advice.
White Spots, Dots & Lines on Your Screen: What They Mean
A white spot, dot, or line on your screen almost always comes from one of three sources: a stuck or dead pixel, physical pressure damage, or a loose display cable. Here is how to tell which one you have.
7 min readHow to Clean a Monitor or Laptop Screen Without Damaging It
Most screen damage from cleaning comes from the wrong liquid or too much pressure, not from cleaning itself. Here is a method that is safe for LCD, LED, and OLED displays.
5 min readHow to Go Full Screen on Any Browser, Windows, or Mac
Every major browser and operating system has a full screen shortcut. Here they all are in one place, plus what to do when full screen will not activate.
6 min readDead Pixel Test: How to Check a Screen Before You Buy or Return It
Whether you are checking a new monitor before the return window closes or investigating a mark on a screen you already own, a dead pixel test is fast and needs no software install.
8 min readWhite Screen of Death: What Causes It and How to Fix It
If an app, browser tab, or your whole device suddenly shows a blank white screen and nothing else, that is a software crash pattern known as the white screen of death. It is fixable in most cases without a repair shop.
Which guide matches what you're seeing
| What you're seeing | Read this guide |
|---|---|
| A dot, spot, line, or patch on your screen | White Spots, Dots & Lines on Your Screen |
| Fingerprints, dust, or streaks on your display | How to Clean a Monitor or Laptop Screen |
| Full screen mode won’t activate or exit | How to Go Full Screen on Any Browser |
| Buying a monitor, checking for dead pixels before a return | Dead Pixel Test Guide |
| An app or website is stuck on a blank white screen | White Screen of Death |
Hardware problems vs. software problems
Hardware: something physical changed
A dead or stuck pixel, a pressure mark, a loose display cable, or backlight bleed are all physical characteristics of the panel itself. These do not resolve with a restart, and some require a repair technician. Our diagnosis guide and dead pixel test guide cover this category.
Software: something crashed or failed to load
A blank white screen in an app, a browser tab, or a WordPress site is almost always a rendering or loading failure, fixable with a restart, cache clear, or reinstall. Our white screen of death guide covers this category in detail, by platform.
Common questions about these guides
Are these guides written by you, or pulled from other sites?
Every guide on this site is written from scratch, based on the specific search terms and questions people actually use, not translated or paraphrased from other sources. Where we reference a manufacturer's policy, we link directly to it rather than restating it secondhand.
How do I know which guide matches my problem?
Start with the size and shape of the mark or issue. A single dot points to the dead pixel test guide. A larger patch or line points to the white spots and screen diagnosis guide. An app or website that will not load points to the white screen of death guide. The comparison table below breaks this down further.
Do the guides require me to use a specific tool?
Most reference the tools on this site, since a full-screen color display is the fastest way to run the diagnostic steps described. You do not need to install anything separately; the tools are linked directly from each guide.
How often are the guides updated?
We review and update guides when a manufacturer changes a policy we reference, or when a correction is submitted through our Contact page. Each guide lists its last update date at the top.
Can I suggest a topic for a new guide?
Yes. Use the Contact page to describe the question you could not find a clear answer to, and we will consider it for a future guide.