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...

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...

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...

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...

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...

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...

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...

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...