Viewsonic P225 Manual Do Utilizador

• Make sure power button (or switch) is ON. 
• Make sure A/C power cord is securely connected to the back of the monitor and to a 

power outlet.

• Plug another electrical device (like a radio) into the power outlet to verify that the 

outlet is supplying proper voltage.

• Make sure the video cable supplied with the monitor is tightly secured to the video output 

port on the back of the computer. If the other end of the video cable is not attached 

permanently to the monitor, tightly secure it to the monitor.

• Adjust brightness and contrast.
• Verify whether an adapter is required for proper signal continuity between graphics 

card and monitor.

• Not enough power supplied. Connect the monitor to a different outlet. If using a surge 

protector, reduce the number of devices plugged in.

• Check the ViewMeter

®

 from the main menu to verify the refresh rate (vertical 

frequency) is 75 Hz or higher. See “Specifications” on page 12. 

• Remove any devices from the area around the monitor that emit magnetic fields such 

as radios, surge protectors, unshielded speakers, fluorescent lights, AC power 

converters, desk fans, etc.

• Make sure the graphics card in your computer can use non-interlaced mode at the 

desired frequencies. To enable your graphics card to support higher refresh rates, try 

selecting fewer colors or running lower resolutions.

• If any colors (red, green, or blue) are missing, check the video cable to make sure it is 

securely connected. Loose or broken pins in the cable connector could cause an 

improper connection.

• Connect the monitor to another computer. 
• Select Degauss from the Main Menu. Do this only once. 
• If you have an older graphics card, contact ViewSonic

®

 Customer Support. 

• Make sure video input signals are within the monitor's specified frequency range.
• Try the monitor with another power source, graphics card, or computer system.
• Connect the video cable securely.

• Press only one button at a time.