Troubleshooting display problems, You can’t project an image, Epson powerlite 7800p projector – Epson 7800P User Manual
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EPSON PowerLite 7800p Projector
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EPSON PowerLite 7800p Projector
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You see the currently selected source displayed in the main 
window, as shown below. All other sources (including the 
currently selected source) are displayed in smaller preview 
windows on the right side and at the bottom.
If no equipment is connected to a port, or if there is no 
incoming signal, the preview window for that source 
appears blank. 
Note: Movies are displayed as still images on the preview 
screen.
2. Press the corresponding
Source
buttons on the remote
control to switch to the desired source. Or press the
ESC
button to exit the preview screen without switching sources.
Note: A red highlight surrounds the preview window for the 
currently selected source. You can use the 
pointer button on
the remote control to highlight a different source, and then press
Enter
to display it.
Troubleshooting Display Problems
You Can’t Project an Image
If you see a blank screen or a blue screen with the
No Signal
message, try the following:
❏ Make sure the cables are connected correctly.
❏ Make sure the P power light is green and not flashing and 
the lens cover is off.
❏ If you’ve connected more than one computer and/or video
source, you may need to press one of the
Source
buttons
on the projector’s control panel or the remote control to 
select the correct source. (Allow a few seconds for the 
projector to sync up after pressing the button.)
❏ If you’re using a PC laptop, press the function key on your
keyboard that lets you display on an external monitor. It 
may be labeled 
CRT/LCD
or have an icon such as
.
You may have to hold down the
Fn
key while pressing it.
Allow a few seconds for the projector to sync up after 
changing the setting.
The Projector and Laptop Don’t Display 
the Same Image
If you’re projecting from a laptop, and you don’t see the same 
image on the projection screen and on your computer screen, 
follow these guidelines.
If you’re using a PC laptop:
❏ On most systems, there’s a function key that lets you toggle
between the LCD screen and the projector, or display on 
both at the same time. It may be labeled 
CRT/LCD
or with
an icon such as
. You may have to hold down the
Fn
key while pressing it. Allow a few seconds for the projector 
to sync up after changing the setting. 
❏ If the function key doesn’t permit you to display
simultaneously on both screens, you should check your 
monitor settings to make sure both the LCD screen and the 
external monitor port are enabled. From the Control Panel, 
open the 
Display
utility. In the Display Properties dialog
box, click the
Settings
tab, then click
Advanced
. The
method for adjusting the settings varies by brand; you may 
need to click a 
Monitor
tab, then make sure the external
Monitor port is set as your primary display and/or enabled. 
See your computer’s documentation or online help for 
details. 
If you're using Macintosh OS X:
You may need to set up your system to display on the 
projector screen as well as the LCD screen. Follow these steps:
1. From the Apple menu, select
System Preferences
, then
select
Displays
.
2. Make sure the
VGA Display
dialog box is selected.
3. Click the
Arrange
tab.
4. Make sure the
Mirror Displays
checkbox is selected.
Computer (Analog-RGB)
BNC
Video
S-Video
DVI
Computer
Currently selected source
Preview windows
Select the 
VGA Display 
dialog box
Make sure Mirror Displays is checked
Click the 
Arrange tab
