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6 • Troubleshooting
146
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Only part of the computer image is displayed.
If the computer’s output resolution setting is higher than 800
×
600
(PowerLite 5550C) or 1024
×
768 (PowerLite 7550C), the projector
resizes the image. If the computer output is not compatible with this
resizing, choose a different display setting on the computer.
In Windows 3.x, use Windows Setup in the Main program group. In
Windows 95/98 or NT 4.0, right-click on the desktop, select
Properties, click the Settings tab, and use the dialog box to select the
resolution you want.
For a Macintosh with Mac OS 8.0 or lower, choose Control Panels
under the Apple menu and then choose Monitors. In the Monitors
screen, choose Options and make sure Macintosh Hi-Res Display or
another 800
×
600 (or 1024
×
768) display is selected. For a
Macintosh with Mac OS 8.1 or above, choose Control Panels under
the Apple menu and then choose Monitors & Sound. In the Monitors
& Sound screen, select a resolution from the Resolution box. For
supported display settings, see “Supported Computers and Monitor
Displays” on page 153.
You may also need to modify your presentation file if you created it
for a different resolution. See your software manual for details.
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The message NO SIGNAL is displayed.
The problem may be any of the following: the wrong image source
is selected, the image source is not connected to the projector,
there’s no signal coming from the computer, or the signal isn’t
reaching the projector. Make sure the connectors are securely
attached to both the projector and the image source.