Category: Lines and Streaks

Red lines on a PC screen usually come from one of three things: a software glitch, a loose or bad cable, or a failing part like the screen or graphics card. This 60-second test shows if yours is a temporary glitch. If they are gone, it was probably a temporary glitch. If they stay, keep […]

A black screen and white line on a Windows laptop can mean the display signal is stuck. Press Win + Ctrl + Shift + B at the same time. Listen for a beep or watch for a flicker. This refreshes the display output. It cannot fix a damaged cable or panel. I have seen this […]

Here’s the fastest way to find out what’s wrong. Unplug the video cable (HDMI or DisplayPort) from your computer, but leave the monitor turned on. Look at the screen. If the white line is still there on the “No Signal” screen, the problem is inside your monitor. If the line disappears, your cable, computer, or […]

Lines on your Mac screen are usually caused by one of two things: a small software or graphics glitch, or a hardware problem like a worn display cable or a failing panel. Both horizontal and vertical lines can show up this way, whether they stay still or flicker on and off. If your screen has […]

Seeing flickering horizontal lines on your laptop screen? Press Windows key + Ctrl + Shift + B right now. Your screen will blink and you’ll hear a short beep. This restarts your display driver without a full reboot. If the lines and flicker vanish, you just fixed a software glitch in under five seconds. If […]

Push both ends of your video cable in firmly first. Still there? Unplug the video cable from the back of the monitor, but leave the power cord plugged in. Look at the floating “No Signal” box. If the line still shows up inside that box, your monitor panel has a hardware fault. If that box […]

A black line on your Mac screen almost always comes from one of two places: the display hardware itself, or something happening in software or the graphics chip. You can find out which one in under a minute. Take a screenshot of your screen. Then open that screenshot and look closely, or move it to […]

A white line just showed up on your screen, and you are probably staring at it right now, panicking. Take a breath. White horizontal lines on phone screen are usually caused by a hard drop, water damage, or a loose cable inside your device. Some cases are simple software glitches you can fix in minutes. […]