The primary reason a monitor displays ghosts is a weak video signal. Weak video signals are caused by the following conditions:
You have connected your monitor to your computer with a cable longer than six feet.
You are using a wireless connector between your computer and your monitor.
You have the monitor set to the wrong resolution.
You are using a KVM switch to connect your monitor to several computers.
If your monitor/computer configuration matches any of the conditions above, changing the condition, as described below, will in almost all cases end your ghosting problems:
If the cable connecting your monitor to your computer exceeds six feet, replace it with a cable that is six feet long or less.
If you are using a wireless connector, move your monitor closer to your PC or replace the wireless connector with a cable that is six feet long or less.
If your LCD monitor is set to the wrong resolution, set it to the correct resolution. A table with a list of native resolutions by monitor size is below.
Monitor Size in Inches
Resolution
Refresh Rate
15 to 16
1024x768
60 Hz
17 to 19
1280x1024
60 Hz
20 to 23
1600x1200
60 Hz
24
1920x1200
60 Hz
Note: Native resolutions and refresh rates vary for CRT monitors by model. See your user's manual for the appropriate resolution and refresh rate for your CRT monitor.
If you are using a KVM switch, connect the ghosting monitor directly to your computer with a cable that is six feet long or less.
Note: On rare occasions, ghosting is caused by the video card. If none of the conditions above match your situation, try attaching your monitor to a PC with a different video card to see if that ends the ghosting.
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