Troubleshooting – VIEWSONIC VP171 User Manual

Page 16

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Troubleshooting

No power

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

LCD display.

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

the outlet is supplying proper voltage.

Power is ON but no screen image

• Make sure the video cable supplied with the

LCD display 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

LCD display,

tightly secure it to the

LCD display.

• Adjust brightness and contrast.
• If you are using an Macintosh older than G3, you need a Macintosh adapter.

Wrong or abnormal colors

• 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

LCD display to another computer.

• If you have an older graphics card, contact ViewSonic for a non-DDC

adapter.

Control buttons do not work

• Press only one button at a time.

ViewSonic VP171/VP171b/VP171s 15

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