Epson Powerlite 7900p Multimedia Projector Users Guide

							Solving Problems111
Checking Projector Status
If your projector isn’t working correctly, first turn it off, wait for it to 
cool (the P Power light stops flashing orange), and unplug it. Then 
plug the power cord back in and turn on the projector. If this doesn’t 
solve the problem, check the lights on top of the projector.
What To Do When the Lights Flash
The lights on top of the projector indicate the projector’s status and 
let you know when a problem occurs.
Refer to the following table for a complete description of the 
projector’s status lights and their meaning:
Temperature light
Lamp light
Power light
Status lights
Light Status Description
orange The projector is in sleep mode. You can unplug it or press the Power 
button to turn it on.
flashing green The projector is warming up. Wait for the image to appear.
green The projector is operating normally.
flashing orange The projector is cooling down. You can’t turn it back on (and you should 
not unplug it) until the light stops flashing and remains orange. 
red 
flashing redThere is a problem with the fan or temperature sensor. Stop using the 
projector, disconnect the power cable, and contact Epson or your dealer. 
						

							112Solving Problems
The   Power light is flashing orange and you cannot turn 
on the projector.
The lamp is cooling down. Wait until the light turns off and then 
press the 
Power button to turn on the projector.
The   Power light does not come on.
Make sure the power cord is connected securely both at the power 
outlet and the projector. If you have just replaced the lamp, make sure 
the cover is securely fastened.
flashing red
flashing orangeRapid cooling in progress. Although this is not an abnormal condition, 
projection will stop automatically if the temperature rises too high again. 
Make sure there is plenty of space around and under the projector for 
ventilation, and that the air filters and vents are clear.
red The projector is overheating, which turns the lamp off automatically. Wait 
until the cooling fan stops, then unplug the power cord. Plug the power 
cord back in and press the P Power button. Make sure the room 
temperature is not above 95 °F (35 °C) and there is plenty of space 
around and under the projector for ventilation. 
The air filters may be clogged. Clean or replace them as described on 
page 103.
If the projector continues to overheat after you clean the air filter, the 
problem may be caused by damage to the cooling fan or temperature 
sensor. Contact Epson for help.
Warning: Except as specifically explained in this User’s Guide, do not 
attempt to service this product yourself.
red
flashing orangeIt’s time to replace the lamp. See page 104 for instructions. If you 
continue to use the lamp after the replacement warning, there is an 
increased possibility that the lamp may break.
flashing red The lamp may be burned out. First make sure the lamp cover is securely 
installed. If that’s not the problem, remove the lamp and replace it as 
described on page 104. If this does not resolve the problem, contact 
Epson as described on page 121.
flashing red Power is cut off because of an internal problem. Remove the power cord 
and contact Epson for help, as described on page 121.
Status lights
Light Status Description 
						

							Solving Problems113
Viewing Lamp Usage and Other Information
Use the About menu to view information about image source, the 
display settings of your computer, and the number of hours the lamp 
has been used. 
1. Press the 
Menu button, then highlight the About menu and press 
Enter. 
You see the lamp usage hours and various input signal settings on 
the right:
The lamp typically lasts from 2000 to 3000 hours, depending on 
the selected Brightness Control setting (see page 68). If the 
number shown is close to that, make sure you have a spare lamp 
handy. If you’ve installed a new lamp, be sure to reset the lamp 
timer (see page 107).
note
The information displayed 
depends on the input signal 
currently selected.Lamp usage 
						

							114Solving Problems
Solving Problems with the 
Image or Sound
No image appears on the screen.
■Check that the P Power light is green, not flashing, and the lens 
cap is off. 
■The projector may be in sleep mode. If the P Power light is 
orange, press the 
Power button to turn the projector on.
■If the power was switched off and then on again, the projector 
may still be cooling down. Wait until the P Power light stops 
flashing and remains orange; then press the 
Power button again.
■Try pressing the other Power button on the remote control or on 
the projector.
■Press the A/V Mute button to make sure the picture has not been 
turned off temporarily. 
■The attached computer may be in sleep mode or displaying a 
black screen saver. Try pressing a key on the computer.
You’ve connected a computer and see a blue screen with the 
message 
No Signal displayed.
■Make sure the cables are connected correctly, as described in 
Chapter 1.
■Try restarting your computer.
■If you’ve connected a computer and one or more video sources, 
you may need to press one of the 
Source buttons on the projector 
or remote control to select the correct source. Allow a few seconds 
for the projector to sync up after pressing the button. 
						

							Solving Problems115
If you’re using a PC notebook:
■Hold down the Fn key on the keyboard and press the function 
key that lets you display on an external monitor. It may have an 
icon such as  , or it may be labelled 
CRT/LCD. Allow a few 
seconds for the projector to sync up after pressing it. Check your 
notebook’s manual or online help for details. 
On most systems, the   key lets you toggle between the LCD 
screen and the projector, or display on both at the same time.
■Depending on your computer’s video card, you might need to use 
the Display utility in the Control Panel to make sure that both the 
LCD screen and external monitor port are enabled. See your 
computer’s documentation or online help for details.
If you’re using Macintosh OS 8.6 to 9.x:
1. From the Apple menu, select 
Control Panels, then click 
Monitors and Sound
.
2. Click the 
Arrange icon.
3. Drag one monitor icon on top of the other. This lets you display 
on the projector screen as well as the LCD screen.
4. If this option isn’t available, click the 
Monitor icon. 
5. Select one of the listed 
Simulscan resolutions. (Allow a few 
seconds for the projector to sync up after making the selection.)
If you’re using Macintosh OS X: 
1. Open 
System Preferences.
2. Double-click 
Displays.
3. Make sure the 
VGA Display or Color LCD dialog box is selected.
4. Click the 
Arrange tab.
5. Make sure the 
Mirror Displays checkbox is selected. 
						

							116Solving Problems
The message Not Supported is displayed.
■Make sure the correct Input Signal is selected in the Setting 
menu (see page 74).
■Make sure your computer’s resolution doesn’t exceed UXGA 
(1600 
× 1200), and the frequency is supported by the projector 
(see page 128). If necessary, change your computer’s resolution 
setting as described in the following section. 
Only part of the computer image is displayed.
■Press the Auto button on the remote control.
■Make sure the image Position setting is correct on the Video 
menu. See Chapter 4 for more information.
■Make sure your computer’s resolution setting is correct. Ideally, it 
should be 1024 
× 768 to match the projector’s native resolution. 
If this option isn’t available, select one of the other compatible 
video formats listed on page 128.
■Windows:
Right-click the desktop, select 
Properties, click the Settings 
tab, and select a different resolution. 
■Macintosh OS 8.6 to 9.x:
On the Apple menu, choose 
Control Panels, then click 
Monitors and Sound. Select a different resolution. 
■Macintosh OS X:
Open 
System Preferences, double-click Displays, and 
then select a different resolution.
■You also may need to modify existing presentation files if you 
created them for a different resolution. See your software 
documentation for specific information. 
						

							Solving Problems117
The image isn’t square, but keystone-shaped.
■If the top or bottom of the image is broader, press the Sync + or 
Sync – button on the projector until the image is square.
■If the projector is angled toward the screen from the left or right, 
the image will be broader on one side. Center the projector in 
front of the middle of the screen, facing the screen squarely. If this 
doesn’t work, press the 
Tracking + or Tracking – button on the 
projection until the image is square.
■If the image is trapezoid-shaped (no parallel sides), use Quick 
Corner. Press the 
Menu button, select the Setting menu, then 
select 
Keystone. Finally, select Quick Corner and make your 
adjustments with the   pointer button. See page 45 for details.
The image contains static or noise.
■Make sure the correct Input Signal is selected in the Setting 
menu (see Chapter 4).
■If you’re using a computer cable longer than 6 feet (2 meters), or 
an extension cable, the image quality may be reduced.
■Keep your computer and video cables away from the power cord 
as much as possible to prevent interference.
■The video signal may be split between the computer and the 
projector. If you notice a decline in the projected image quality 
when the image is displayed simultaneously on your notebook 
computer and the projector, turn off the notebook’s LCD display.
The image is blurry.
■There may be dirt or smears on the lens. Clean the lens as 
described on page 102.
■Adjust the focus using the focus ring.
■Make sure the lens is not fogged by condensation. You may need 
to wait before using the projector after moving it from a cold 
environment to a warm environment. 
						

							118Solving Problems
■Make sure the projector is within the recommended projection 
distance (2.5 to 36.5 feet).
■Adjust the Sharpness setting on the Video menu (see Chapter 
4). When you change video settings, you should be able to see the 
effect on the screen immediately. If you’re projecting from a 
computer, you may also need to adjust the tracking and sync as 
described in the next section. If you don’t like the new settings, 
you can always select 
Reset to return to the factory default 
settings.
You see vertical stripes, or the image still looks blurry after 
trying the solutions in the previous section.
■If you’re projecting from a computer and displaying an image that 
contains a lot of fine detail, you may notice one or more vertical 
stripes or bands, or some of the characters may look heavy or 
blurred. Press the 
Auto button on the remote control. This resets 
the projector’s tracking and sync settings.
■If further adjustment is needed, you can fine-tune the Tracking 
and 
Sync settings manually using the Video menu as described in 
Chapter 4.
1. Fill the screen with an image containing fine detail when 
making these adjustments. For example, in Windows you can 
select a pattern to appear as your desktop background. If this 
option isn’t available, try projecting black text on a white 
background.
2. Adjust the 
Tracking to eliminate vertical stripes.  
						

							Solving Problems119
3. Adjust the Sync setting to increase the sharpness of the 
image. 
The colors of the image are not right.
■If you’re displaying a computer image, use the Color Mode 
option in the projector’s Video menu to adjust the color. If you’re 
displaying video, adjust the 
Color, Tint, and Color Mode 
settings on the Video menu.
■Try changing the Color Adjustment setting on the Advanced1 
menu.
■Check your computer display settings to correct the color balance.
There is no sound.
■Make sure the A/V Mute button is not enabled.
■Try adjusting the Volume setting in the Audio menu (see 
page 73).
■If you’re using a VCR or other video source, make sure the 
volume is not turned all the way down or muted. Also, make sure 
the cables are connected correctly, as described in Chapter 1.
■If your presentation includes computer audio, make sure the 
volume control on your computer is not turned all the way down 
or muted. If you’re using the audio cable, make sure it is securely 
connected to both the projector and your computer’s   
headphone jack or   audio out jack.
■Make sure the Windows volume controls on your computer are 
not turned all the way down or set to Mute. You may be able to 
check this by clicking the volume control in your Windows 
System Tray (lower right corner of the screen).
note
Because of the different 
technologies used, your 
projected image may not 
exactly match the colors on 
your notebook or computer 
monitor. 
						

							120Solving Problems
Solving Easy Management Problems 
You don’t see your projector in the EMP Monitor window.
■Make sure that you’ve connected the projector to the network and 
configured it correctly; see page 87. Also, make sure you’ve 
registered the projector with EMP Monitor. See page 90.
■Make sure that Standby Mode in the Advanced1 menu is set to 
Network ON.
■If the computer you are using is running Windows XP, 2000, or 
NT 4.x, you must be logged in as the Administrator.
■Try restarting your computer.
Solving Problems with the Remote 
Control
The projector doesn’t respond to remote control commands.
■If you’re using the remote control for the first time, be sure to 
push up on the on/off switch, as shown on page 52.
■The remote control’s battery may not be installed correctly or may 
be low on power. To change the battery, see page 54. 
■Make sure your remote control’s ID is set to 0, or to the 
projector’s ID. See page 64.
■Make sure you are within 33 feet (10 meters) of the projector, and 
within range of the projector’s front or back sensor 
(approximately 30° to the left or right and 15° above or below).
■Dim the room lights and turn off any fluorescent lights. Make 
sure the projector is not in direct sunlight. Strong lighting, 
especially fluorescent lights, may affect the projector’s infrared 
receivers. Also, turn off any nearby equipment that emits infrared 
energy, such as a radiant room heater.