Epson Powerlite 755c Multimedia Projector Users Guide

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1
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. The following information is included:
■Using the projector’s on-screen help system
■What to do when the projector’s status lights flash
■Solving projector operation problems
■Solving problems with the image or sound
■Solving network problems
■Solving EasyMP problems
■Solving problems with the remote control
■Contacting technical support 
						

							152Solving 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 blue 
? Help button on top of the projector or 
on the remote control. The following choices are available:
■Problems with image
■Problems with sound
■Problems with source search
■Language change 
Follow these steps to get help:
1. Press the blue 
? Help button on the remote control or on the 
projector. 
You see the Help Menu.
2. Use the   pointer button on the remote control or the arrow 
buttons on the projector to highlight menu items.
3. Press the 
Enter button on the remote control or on the projector 
to select the menu item. 
4. To exit the help system, press the 
? Help button.
If none of the suggestions solve your problem, see additional solutions 
to problems in the following sections. 
						

							Solving Problems153
Checking Projector Status
If your projector isn’t working correctly, first turn it off, wait for it to 
cool (the 
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.
Refer to the following table for a complete description of the 
projector’s status lights:
Temperature 
lightLamp light Power light
Status lights
Light Status Description
Orange The projector is in sleep or standby mode. You can unplug it or press the 
P 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 There is a problem with the projector. Check the other two lights and the 
information on page 154 to diagnose the problem.  
						

							154Solving Problems
Flashing red  There is a problem with the fan or temperature sensor. Stop using the 
projector, disconnect the power cable, and contact Epson as described 
on page 166.
Flashing orange Rapid cooling is in progress. Although this is not an abnormal condition, 
projection will stop automatically if the temperature rises higher. 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 145.
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 as described on page 166.
Warning: Except as specifically explained in this User’s Guide, do not 
attempt to service this product yourself.
Flashing orange It’s time to replace the lamp. See page 146 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 burnt out. First make sure the lamp cover is securely 
installed. If that’s not the problem, let the lamp cool, remove the lamp, 
and replace it as described on page 146. If this does not resolve the 
problem, contact Epson as described on page 166.
Flashing red Power is cut off because of an internal problem. Unplug the power cord 
and contact Epson for help, as described on page 166.
Status lights
Light Status Description 
						

							Solving Problems155
Viewing Lamp Usage and Other Information
Use the Info menu to view information about the display settings of 
your computer and the number of hours the lamp has been used. 
Press the 
Menu button and highlight the Info menu. 
You see the lamp usage hours and various input signal settings on the 
right. 
The life span of the lamp is about 2000 hours if the 
Brightness 
Control
 setting in the Setting menu is set to High (default), and 
3000 hours if the 
Brightness Control setting is set to Low. Make 
sure you have a spare lamp handy if the usage hours on this menu 
are close to the life span of your lamp.
Solving Projector Operation Problems
The power doesn’t turn on.
■If the projector doesn’t turn on when you press the PPower 
button, make sure the power cable is connected to the projector 
and plugged into a working electrical outlet.
■The power cable may be defective. Disconnect the cable from the 
outlet and contact Epson as described on page 166.
The buttons on the projector don’t work.
If the Operation Lock function has been enabled, you can’t use the 
buttons on the projector. Try using the remote control instead. See 
page 119 for information about the Operation Lock function.
You hear the projector’s fan after the power has been turned 
off.
If Standby Mode is set to Network ON, the fans continue to operate 
after the projector has cooled down. See page 120 for more 
information about this setting.
note
The information displayed 
depends on the input signal 
currently selected. 
						

							156Solving Problems
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 standby or sleep mode. If the Power 
light is orange, press the P
Power button to turn the projector 
on.
■If the power was switched off and then on again, the projector 
may be cooling down. Wait until the 
Power light stops flashing 
and remains orange; then press the P
Power button again.
■Press the A/V Mute button on the remote control 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.
■If you are projecting from a DVD player or other video source, 
make sure you turn it on and press its 
Play button.
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 on 
page 38.
■Try restarting your computer.
■If you’ve connected a computer and one or more video sources, 
you may need to press the 
Source Search button on the 
projector or one of the source buttons on the remote control to 
select the correct source. Allow a few seconds for the projector to 
sync up after pressing the button. 
						

							Solving Problems157
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 X: 
1. Open 
System Preferences.
2. Click 
Displays.
3. Make sure the 
VGA Display or Color LCD dialog box is selected.
4. Click the 
Arrangement or Arrange tab.
5. Make sure the 
Mirror Displays checkbox is selected.
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.) 
						

							158Solving Problems
The message Not Supported is displayed.
■Make sure the correct input signal is selected in the Signal menu 
(see page 111).
■Make sure your computer’s resolution doesn’t exceed UXGA 
(1600 
× 1200) and the frequency is supported by the projector 
(see page 177). If necessary, change your computer’s resolution 
setting as described below. 
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 Signal 
menu. See page 112 for more information.
■Press the Resize button on the remote control.
■Press the Esc button on the remote control to cancel the E-Zoom 
function.
■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 177.
■Windows:
Right-click the desktop, select 
Properties, click the Settings 
tab, and select a different resolution. 
■Macintosh OS X:
Open 
System Preferences, click Displays, and select a 
different resolution.
■Macintosh OS 8.6 to 9.x:
On the Apple menu, choose 
Control Panels, and click 
Monitors and Sound. 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 Problems159
The image isn’t square, but keystone-shaped.
■If the top or bottom of the image is broader, press the   or   
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. 
The image contains static or noise.
■If you’re using a computer cable longer than 6 feet, 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.
■Make sure the correct input signal is selected in the Signal menu 
(see page 112).
The image is blurry.
■There may be dirt or smears on the lens. Clean the lens as 
described on page 144.
■Adjust the focus using the focus ring (see page 24).
■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.
■Adjust the Sharpness setting on the Image menu (see page 111). 
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. 
						

							160Solving Problems
You see vertical bands 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 vertical bands or some 
of the characters may look heavy or blurred. Press the 
Auto 
button on the remote control to reset the projector’s tracking and 
sync settings.
■If further adjustment is needed, you can fine-tune the Tracking 
and 
Sync settings manually using the Signal menu, as described 
on page 112.
1. Fill the screen with an image containing fine detail, such as a 
pattern to appear as your desktop background, or try 
projecting black text on a white background.
2. Adjust the 
Tracking to eliminate vertical bands. 
3. Adjust the 
Sync setting to increase the image sharpness. 
The image is too light or dark, or colors are incorrect.
■If you’re displaying a computer image, use the Color Mode 
option in the projector’s Image menu to adjust the color (see 
page 110). 
■If you’re displaying video, adjust the Color Adjustment and 
Color Mode settings on the Image menu. You can also try 
adjusting the 
Color Intensity and Tint settings on the Image 
menu.
note
Because of the different 
technologies used, your 
projected image may not 
exactly match the colors on 
your notebook or computer 
monitor.