Epson Powerlite 7550c Users Guide

							5    Maintenance             138 
						

							139
6Troubleshooting
T
his chapter describes how to interpret your projector’s warning 
lights and what to do when you encounter problems. It’s divided 
into the following sections:
p
“Using the Online Help Menu” on page 140 describes how to 
use the projector’s online help for problems with the image or 
sound.
p
“Problems with the Projector” on page 141 tells you what to do 
if any of the projector’s warning lights come on.
p
“Problems with the Remote Control” on page 144 tells you what 
to do if the projector is not responding to remote control 
commands. 
						

							6    Troubleshooting             140
p
“Problems with the Image or Sound” on page 145 describes 
what to do if you can’t project an image, if the screen image is 
not good, or if there is no sound.
If you have a problem, check the appropriate section and follow all 
suggestions that apply to your problem. If none of the suggestions 
solve the problem, call your dealer or contact EPSON as described 
on page 7.
Using the Online Help Menu
The online Help menu provides useful information that can resolve 
some common image or sound problems. To open the online Help 
menu, press the Help button on the control panel or the remote 
control. You’ll find help for the following problems:p
No image appears on the screen
p
The image is blurred or not in focus
p
Only part of the image is displayed
p
Colors in the image are not correct
p
The image is too dark
For some of the problems listed above, you can make adjustments 
within the Help menu to correct the problem.
Note: Each Help menu displays navigation buttons and descriptions 
at the bottom of the screen. Projector control functions are 
displayed as icons in the help text. 
						

							Problems with the Projector
141
Problems with the Projector
If you have problems with the projector, first turn it off and unplug 
it. Then plug the power cord back in and turn the projector back on. 
If this doesn’t solve the problem, check the lights on top of the 
projector. These lights alert you to problems with projector 
operation
. 
power light
temperature light projector lamp light 
						

							6    Troubleshooting             142
See the following pages for information on what to do when you see 
these warning lights or encounter other specific problems with the 
projector.Light Color Meaning
Temperature Flashing orange The projector is too hot.
Red The projector has turned off automatically because 
of overheating.
Flashing red There’s a problem with the cooling fan 
or temperature sensor. Call a service 
representative.
Projector
lampRed or
flashing orange and 
redThe lamp needs to be replaced. See “Replacing the 
Lamp” on page 134 for instructions.
Flashing red There’s a problem with the projector lamp, lamp 
power supply, or a lamp fuse; or there’s a circuit 
malfunction in the projector.
Power Flashing green The projector is warming up. Allow about 30 
seconds.
Flashing orange The projector is cooling down.
Steady green Both the power and the projector lamp are on.
Steady orange The projector is in sleep mode.
Off There’s an internal projector problem, or the power 
to the projector has been cut off. 
						

							Problems with the Projector
143
w
The power light is flashing orange and you can’t turn the 
projector on.
The projector is cooling down. Wait until the light stops flashing 
and then turn the projector on.
w
The projector screen is blank and the lamp is off.
If there is no video signal for 30 minutes, the projector goes into 
sleep mode. To resume, make sure the video signal is active and 
then press the Power button.
w
The power light doesn’t come on.
Turn the projector off, check that the power cable is securely 
connected both at the electrical outlet and the projector, and press 
the on/off switch at the back of the projector and then press the 
Power button.
w
Projected images get darker or start to deteriorate, or the 
projector lamp light is red.
Replace the projector lamp as described in “Replacing the Lamp” on 
page 134.
w
The temperature light is red.
The projector is overheating, which turns the lamp off 
automatically. Let the projector cool for a few minutes, then turn it 
back on. Make sure nothing is blocking the ventilation vents.
The air filter may be clogged. Clean it as described in “Cleaning the 
Air Filter” on page 133, then let the projector cool for awhile. 
						

							6    Troubleshooting             144
If the projector continues to overheat after you clean the air filter, 
the problem may be caused by damage to the cooling fan or internal 
circuits. Contact a qualified service person. 
Warning: Don’t attempt to perform any servicing other than the 
maintenance procedures explained in Chapter 5.
Problems with the Remote Control
w
The projector doesn’t respond to remote control commands.
The remote control may be too far from the projector, or at too wide 
an angle to the infrared receiver. See page 59 for details.
The remote control’s batteries may be low on power. Replace them.
If you are using the remote as a wireless mouse, make sure the 
projector’s mouse cable is securely connected to both your 
computer’s mouse port and to the projector’s Mouse/COM port (or 
the main cable if you are using ELP Link III). For details, see 
Chapter 1 (or Chapter 4 for ELP Link III).
Light that is too strong, or certain types of fluorescent lighting may 
affect the projector’s infrared receivers. Dim the ambient lighting 
and turn off any fluorescent lighting. Move the projector out of 
direct sunlight.
Turn off any nearby equipment that emits infrared energy, such as a 
radiant room heater. 
						

							Problems with the Image or Sound
145
If you are using ELP Link III, make sure you selected the correct 
COM (communication) port for the serial cable when you set up the  
ELP Link III software. If necessary, you can change the COM port 
from the Option menu. See page 101 for more information.
Problems with the Image or Sound
w
No image appears on the screen.
Check that the power light is on and the lens cover is off. Also make 
sure the power cord, video cable, and any other cables you are using  
are securely connected, as described in Chapter 1 (and Chapter 4 for 
ELP Link III).
The correct image source may not be selected. Press the Source 
button on the remote control or the control panel to choose another 
image source. 
Some screen savers appear as a blank screen. Make sure any screen 
savers on your computer are disabled while using the projector.
w
A screen saver appears on the screen and won’t go away.
Press the ESC key, the right mouse button, or the top multi-purpose 
button (if you’re using the remote control as a mouse) to stop the 
screen saver. This will also clear any effects you have on the screen. 
You should disable any screen savers on your computer before 
using the projector. 
						

							6    Troubleshooting             146
w
Only part of the computer image is displayed.
If the computer’s output resolution setting is higher than 800 
× 600 
(PowerLite 5550C) or 1024 
× 768 (PowerLite 7550C), the projector 
resizes the image. If the computer output is not compatible with this 
resizing, choose a different display setting on the computer. 
In Windows 3.x, use Windows Setup in the Main program group. In 
Windows 95/98 or NT 4.0, right-click on the desktop, select 
Properties, click the Settings tab, and use the dialog box to select the 
resolution you want. 
For a Macintosh with Mac OS 8.0 or lower, choose Control Panels 
under the Apple menu and then choose Monitors. In the Monitors 
screen, choose Options and make sure Macintosh Hi-Res Display or 
another 800 
× 600 (or 1024 
× 768) display is selected. For a 
Macintosh with Mac OS 8.1 or above, choose Control Panels under 
the Apple menu and then choose Monitors & Sound. In the Monitors 
& Sound screen, select a resolution from the Resolution box. For 
supported display settings, see “Supported Computers and Monitor 
Displays” on page 153.
You may also need to modify your presentation file if you created it 
for a different resolution. See your software manual for details.
w
The message NO SIGNAL is displayed.
The problem may be any of the following: the wrong image source 
is selected, the image source is not connected to the projector, 
there’s no signal coming from the computer, or the signal isn’t 
reaching the projector. Make sure the connectors are securely 
attached to both the projector and the image source.  
						

							Problems with the Image or Sound
147
Then check that the image source is selected correctly. If your 
projector is attached to a Macintosh, make sure that the DIP 
switches on your Macintosh desktop adapter are set correctly. (See 
your Macintosh documentation if you need instructions.) 
When NO SIGNAL is displayed, you can’t access any options on 
the Video menu except Auto. Try turning the Auto Set Up feature 
off, then restart your computer and manually adjust the Tracking 
and Sync settings. 
The computer’s power management may cause the screen to go 
blank or display NO SIGNAL.
w
A blank screen is displayed.
The projector can’t interpret the computer signal. Verify the display 
format (see page 153). When you see a blank screen, you can’t 
access the projector menus.
w
The image or parts of the image are blurred or not in focus.
Adjust the zoom and focus lens rings.
Try adjusting the Tracking and Sync buttons on the projector’s 
control panel or remote control.
Adjust the Brightness and Contrast settings on the Video menu. If 
there is no video for 30 minutes, the projector goes into sleep mode 
and the lamp is turned off. 
There may be dirt or smears on the lens. Clean the lens as described 
on page 132.