Why does the screen appear yellow on my ViewSonic VS18521 Monitor?
- SSarah JohnsonSep 10, 2025
If your ViewSonic monitor screen appears yellow, make sure the “Blue Light Filter” is Off.

Why does the screen appear yellow on my ViewSonic VS18521 Monitor?
If your ViewSonic monitor screen appears yellow, make sure the “Blue Light Filter” is Off.
Why are the colors wrong or abnormal on my ViewSonic VS18521?
If the colors on your ViewSonic monitor are wrong or abnormal, and any colors (red, green, or blue) are missing, check the video cable to make sure it is properly and securely connected. Loose or broken pins in the cable connector could cause an improper connection. Additionally, connect the monitor to another computer. If you have an older graphics card, contact ViewSonic® for a non-DDC adapter.
Why some menus aren’t selectable in the OSD on my ViewSonic Monitor?
If some menus aren’t selectable in the OSD of your ViewSonic Monitor, try adjusting the ViewMode or the input source. If the issue persists, reset the monitor to factory settings.
What to do if USB devices connected to the ViewSonic VS18521 do not work?
If USB devices connected to your ViewSonic monitor do not work, ensure the USB cable is connected properly. Try changing to another USB port, if applicable. Note that some USB devices require a higher electric current, so connect the device directly to the computer.
Lists items included in the monitor package.
Visual identification of monitor front, rear, and connection ports.
Step-by-step guide for attaching the monitor stand.
Instructions for securely mounting the monitor on a wall.
How to use a security cable to prevent theft or falling.
Steps to connect the monitor to an electrical power outlet.
Guide for connecting video sources like HDMI and VGA.
How to tilt the monitor for optimal viewing.
Instructions for powering the monitor on and off.
Explanation of the monitor's control panel buttons and their functions.
How to access and use the quick menu options.
Details on special functions accessed via key combinations.
Guide to navigating and adjusting monitor settings via OSD.
Hierarchical structure of the monitor's on-screen display menu options.
Detailed technical data and parameters of the monitor.
Definitions of technical terms used in the manual.
Solutions for common problems and issues.
Guidelines for keeping the monitor clean and in good condition.
Information on FCC, RoHS, WEEE, and other regulatory compliance.
Legal notices, copyright, and liability limitations.
Contact information and procedures for technical support.
Details on warranty coverage, exclusions, and claims.
Specific warranty terms for products sold in Mexico.
List of authorized service centers within Mexico.












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