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Quantumgravity
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What causes the horizontal lines that move down a computer or TV screen when you video tape it?
Danger said:This 'strobe' effect is also the reason for spoked wheels on TV sometimes appearing to rotate the wrong way.
The most common cause of horizontal lines on a screen is a loose or damaged cable connecting the monitor to the computer. Other possible causes include a faulty graphics card, outdated display drivers, or a malfunctioning monitor.
The first step is to check the cable connecting your monitor and computer to ensure it is securely plugged in. If that does not resolve the issue, try updating your display drivers or resetting your monitor's settings to factory defaults.
This could be a sign of a damaged or failing graphics card. It is recommended to run a diagnostic test on your graphics card to determine if it needs to be replaced.
In rare cases, horizontal lines on a screen can be caused by a virus or malware. It is important to run a virus scan on your computer to rule out this possibility.
The best way to prevent horizontal lines on your screen is to regularly update your display drivers and keep your computer and monitor in a well-ventilated and dust-free environment. Additionally, try not to move or bump your monitor too often, as this can cause loose connections and potentially lead to horizontal lines.