Product information guide
EPSON PowerLite 7800p Projector
5/03 EPSON PowerLite 7800p Projector - 5
Follow these guidelines when using an external monitor:
❏ The monitor displays the currently selected computer 
source. Press the 
Preview button on the remote control if 
you want to display all the active sources at once (see 
“Previewing Image Sources” on this page).
❏ If you want, you can view (or preview) images on the 
monitor while the projection screen is darkened by pressing 
the 
A/V Mute button. 
❏ You can also view images on the monitor while the 
projector is in standby mode (plugged in but not turned 
on). Set the 
Standby Mode setting to Network ON in the 
Advanced1 menu. 
Displaying an Image
If you turn on your computer or video equipment before 
turning on the projector, the projector automatically selects 
the connected source. If you turn on the projector first or you 
have multiple sources connected, you may have to switch to 
the desired source manually (see “Selecting the Image Source” 
on this page). 
Turning On the Projector
1. Remove the lens cap.
2. Plug in the projector. 
3. Wait a few seconds until the P
power light stops flashing 
and turns orange. 
4. Press the red P
Power button on top of the projector or on 
the remote control.
Note: If you’re using the remote control, 
make sure batteries are installed and the 
power switch on the side of the remote 
control is turned on. 
The P
power light flashes green as the projector warms up, 
and an image begins to appear after about 30 seconds. 
When the P
power light stops flashing and remains green, 
the projector is ready for use. 
Warning: Never look into the lens when the lamp is on. This 
can damage your eyes.
5. If you’ve connected a Windows-based computer to the 
projector, you may see a New Hardware Wizard saying 
your computer has found a plug-and-play monitor; if so, 
click 
Cancel.
Selecting the Image Source
If multiple devices are connected to the projector, you can use 
the 
Source buttons on the projector or the remote control to 
switch from one source to another:
❏ The projector has two 
Source buttons. 
Use the 
Computer/DVI button to 
switch between equipment 
connected to the 
Computer and 
DVI ports.
Use the 
Video/BNC button to switch 
between equipment connected to the 
Video, S-Video, and BNC ports. 
❏ The remote control has five 
Source buttons you can use to 
switch between equipment 
connected to the port identified 
on each button. (The PowerLite 
7800p does not support 
EasyMP.
™
 )
You can preview all sources to help you select the desired 
source, as described below.
Note that the 
Computer and BNC ports can be set up to use 
different input signals (for example, Analog RGB or RGB 
Video)—so if you have equipment connected to one of these 
ports, it’s important to select the correct signal to match the 
equipment you’re using. You can change the input signal 
settings using the projector’s menu system as described in 
“Types of Connections” on page 4.
Previewing Image Sources
You can use the Preview function to help you select the image 
source when you have connected multiple sources to the 
projector. 
1. Press the 
Preview button on the 
remote control.
Power button
Preview










