Epson Powerlite 720c Multimedia Projector Users Guide

							Maintaining and Transporting the Projector55
5. Use a screwdriver to loosen the two screws holding the lamp in 
place. (You can’t remove the screws.) 
6. Hold the lamp by the top, as shown, and pull the lamp straight 
out. 
7. Gently insert the new lamp. 
8. Once the lamp is fully inserted, tighten its screws.
9. Replace the lamp cover.caution
Do not touch the glass 
portion of the lamp assembly. 
Touching the glass could 
result in premature lamp 
failure.
warning
This product includes a lamp 
component that contains 
mercury. Please consult your 
state and local regulations 
regarding proper disposal and 
do not place in a waste 
stream.
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							56Maintaining and Transporting the Projector
Resetting the Lamp Timer
You must reset the lamp timer after replacing the lamp to clear the 
LAMP REPLACE warning message. Follow the directions below to 
reset the lamp timer:
1. Press the 
Menu button. You see the main menu.
2. Use the directional buttons to highlight 
About. You see the 
following:
3. Press 
Enter to select the About menu.
4. Press 
Enter to select the Reset Lamp Timer option. You see the 
following:
5. Use the directional buttons to select 
Yes and press Enter.
6. Press 
Esc to return to the main menu.
7. Press 
Esc again (or the Menu button) to exit the menu system.
: Select : Enter
Video
Audio
Setting
Users Logo
Advanced
About
Reset All
Frequency Video Source
V ---.--Hz Reset Lamp Timer
H ---.--kHz Lamp 0H
SYNC Mode SYNC Polarity
------V ------ H ------
Resolution
Refresh Rate 0.0 Hz0x    0 Computer
Input Signal
: : :
: :
:
: : Analog-RGB
Execute
Reset Lamp Timer
Execute?
YESNO
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							Maintaining and Transporting the Projector57
Transporting the Projector
The projector contains many glass and precision parts. If you need to 
transport it, please follow these packing guidelines to prevent damage 
to the projector: 
■When shipping the projector for repairs, use the original 
packaging material if possible. If you do not have the original 
packaging, use equivalent materials, placing plenty of cushioning 
around the projector.
■When transporting the projector as freight or checked luggage, 
first put it in the supplied carrying case, then pack it in a firm box, 
using cushioning around the case. 
■When you are hand-carrying the projector, be sure to use the 
supplied carrying case.
note
EPSON shall not be liable 
for any damages incurred 
during transportation.
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							58Maintaining and Transporting the Projector
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							Solving Problems59
6
Solving Problems
This chapter helps you solve problems with your projector, and tells 
you how to contact technical support for problems you can’t solve 
yourself. This chapter explains the following:
■Using the projector’s on-screen help system
■What to do when the projector’s status lights flash
■Solving problems with the image or sound 
■Solving problems with the remote control
■Contacting technical support
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							60Solving Problems
Using On-Screen Help 
If the image doesn’t look right or your audio isn’t working, you can 
get help by pressing the green 
? Help button on top of the projector. 
The following choices are available:
■Help for the image
■Help for the sound
■Language selection
Follow these steps to get help:
1. Press the green 
? Help button on the projector. You see the help 
menu.
2. Press the left side of the 
Select (Keystone) button on the 
projector to highlight one of the options. Then press the 
Enter 
(
Source) button on the projector to select it.
3. Press the left side of the 
Select (Keystone) button on the 
projector to highlight the problem you want to solve. Then press 
the 
Enter (Source) button to view the solution(s). 
4. Highlight a solution (if this choice is available). Then press the 
Enter (Source) button to select the solution. 
Highlight 
Return and press the Enter (Source) button if you 
need to back up.
If the solution is to adjust one of the settings, press the left side of 
the 
Select (Keystone) button on the projector to adjust it.
5. To exit the Help system, press the green
 ? Help button.
If none of the suggestions solves your problem, see additional 
solutions to problems in the following sections.
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							Solving Problems61
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.
If the projector is not working correctly, first turn it off and unplug it. 
Then plug the power cord back in and turn on the projector. If this 
does not solve the problem, check the status lights on top of the 
projector and try the solutions recommended below.
Status Lights
power light
warning light
Power
lightWarning
light Status Description
Flashing red Flashing red Internal error There is an internal error in the projector. Turn 
the projector off and unplug it. Contact EPSON 
for help.
Red Flashing red Fan error/
Temperature 
sensor error/
Lamp errorThere is a problem with the cooling fan, 
temperature sensor, or lamp. Turn off the 
projector and unplug it. Contact EPSON for 
help.
Flashing red Flashing red 
(quickly)Lamp failure The lamp is burned out. Replace it as 
described on page 54.
Off Red Overheating The projector has overheated and turned itself 
off. Let it cool for a few minutes, then turn it 
back on. Make sure there is plenty of space 
around and under the projector for ventilation. 
If it continues to overheat, you may need to 
change the air filter. See page 53 for 
instructions.
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							62Solving Problems
Flashing orange Flashing orange 
(quickly)High 
temperature 
warningThe projector is too hot. Make sure the 
temperature surrounding the projector does 
not exceed 95
 °F and there is plenty of space 
around and under the projector for ventilation. 
Clean the air filter, if necessary. See page 53 
for instructions.
Green Flashing orange Lamp warning The lamp is almost burned out. This is a good 
time to replace it. See page 54 for instructions.
Orange Off Sleep  mode The projector is in sleep mode. You can unplug 
it or press the PPower button to turn it on.
Flashing green Off Warming up The projector is warming up. Wait for the 
image to appear.
Green Off Operating  The projector is operating normally.
Flashing orange Off Cooling down The projector is cooling down. Wait for the 
light to become solid before unplugging it. Power
lightWarning
light Status Description
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							Solving Problems63
Solving Problems with the Image or 
Sound
No image appears on the screen.
■Check that the power light is green, not flashing, and the lens cap 
is off. 
■The projector may be in sleep mode. If the power light is orange, 
press the 
PPower 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 power light stops 
flashing and remains orange; then press the 
PPower button 
again.
■Make sure the Brightness setting on the Video menu is correct. 
See page 41 for more information. Try selecting the 
Reset All 
setting to return all setup menus to their default values. 
■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 see a blue screen with the message No Signal displayed.
■Make sure the cables are connected correctly, as described in 
Chapter 1 or Appendix A.
■Try restarting your computer.
■If you’ve connected a computer and one or more video sources, 
you may need to press the 
Source button (on the projector) or 
the 
Computer or S-Video/Video button (on the remote control) 
to select the correct source. Allow a few seconds for the projector 
to sync up after pressing the button.
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							64Solving Problems
If you’re using a PC laptop:
■Hold down the Fn key 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 laptop’s 
manual or online help for details. 
On most systems, the   or 
CRT/LCD 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 a PowerBook or iBook with
Macintosh OS 9.x:
1. From the Apple menu, select Control Panels, then click 
Monitors or 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 the 
Arrange icon 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 a PowerBook or iBook with 
Macintosh OS X:
1. From the Apple menu, select System Preferences, then 
click 
Display.
2. Select the 
VGA Display dialog box, click the Arrange tab, 
then put a check mark in 
Mirror Displays.
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