eMachines H3120 Manuel D’Utilisation

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CHAPTER 14: Troubleshooting
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Media Center
The Media Center video display looks bad on your TV
Many factors, such as the display type, quality of the video source, type 
of connection used, quality of video cables, display device screen 
resolution, size of TV, age of the TV, or the type of TV (interlaced or 
progressive scan), can affect the video quality significantly:
Display type—The Media Center is best viewed on display devices 
that were offered with the Media Center computer when you 
purchased it from eMachines. Other types of display devices, 
including retail TVs, may provide lower quality video. If you did not 
order a display device when you purchased your Media Center 
computer, a progressive scan display device with a VGA input is the 
best choice. 
Quality of video source—The quality of the video signal coming 
into the Media Center computer has an affect on the video quality. 
The video displayed from the Media Center is only as good as the 
source video signal. Cable, digital cable, and satellite usually 
provide better quality than an antenna. 
Type of connection used—You can connect the Media Center 
computer video output to a TV. However, the connection type has 
an affect on the video quality. The Media Center has two video 
outputs:
VGA—If your TV includes a VGA port, connect the VGA cable from 
the Media Center computer’s VGA (monitor) port to the TV’s VGA 
In port for the best quality. Many TVs do not have a VGA port.
S-Video—If your TV does not have a VGA port, but includes an 
S-Video port, connect the S-Video cable from the Media Center 
computer’s S-Video Out port to the TV’s S-Video In port. S-Video 
display quality is usually good for TV images. The display quality 
for the Media Center computer functions, however, is not as good 
as VGA output. S-Video display output is not optimized for 
computer video display.
Quality of video cables—Poor quality or the incorrect type of video 
cables can cause problems and affect the video quality. Cable 
connections must be made correctly for optimal video quality. A 
poor cable connection can lower video quality.
Screen resolution—By default, if your display device was 
purchased with the Media Center computer, the computer uses a 
screen resolution of 1024 × 768 for computer monitors. Many TVs 
cannot display this high a resolution and may shift, scramble, or 
scroll the picture. For a better picture on a TV display, you may need 
to lower the Media Center screen resolution to 800 × 600 or 
640 × 480. See Windows Help & Support for more information 
about changing the screen resolution.
Size of display device—Small computer monitors for standard 
computer applications are generally not optimized for motion 
video playback. Although they offer excellent resolutions and 
refresh rates, they are designed to make static white backgrounds 
with black text look readable. Some small display devices do not 
make colorful motion video look its best. Generally, video will look 
better on a larger display device.