InFocus LP840 Projector User Manual

							21
Image fuzzy or cropped Set your computer’s display resolution to 
the native resolution of the projector 
(Start>Settings>Control 
Panel>Display>Settings tab, 
select1024x768) Image clear and not cropped
Remote control navigation buttons not working 
with my computerConnect USB cable (page 8) then load USB 
drivers, if needed (page 11). Or, connect 
wired remote cable and reboot your 
computer (page 8).Remote controls navigation buttons. 
See page 27 for information on the remote
A
AA
For a laptop,
disable laptop
monitor
or turn-on dual-
display mode
A
X
  
						

							22
Projector troubleshooting
Problem Solution Result
Image not square Adjust keystone the Picture menuSquare image
Image not sharpAdjust the focus on the keypad or 
Sharpness in the Picture>Advanced menuCorrect image
Image does not fit 16:9 screenChange aspect ratio to 16:9 in 
Picture>Aspect ratio menuCorrect image
ABAB
AB 
						

							23
Image upside downTurn on/off Ceiling in Settings>System 
menuCorrect image
Image reversed left to right
Turn on/off Rear in Settings>System menu
Correct image 
Projected colors don’t match source
Adjust color, tint, color temperature, 
brightness, contrast in the menusCorrect image
A
B
AB
A
AB
COLOR
COLOR 
						

							24
Lamp won’t turn on, Temp LED solid red (page 46)Make sure vents aren’t blocked; allow 
projector to cool for one minute Unplug projector; wait one minute; plug in 
projector and turn it on: lamp lights
Lamp won’t turn on, Lamp LED blinking red 
(page 46)Lamp must be replaced (page 40)
Lamp turns onsolid
red
temp
lamp
 
startup
screen
blinking
red
temp
lamp
startup
screen 
						

							25 Still having problems?
If you need assistance, visit our website or call us. See the inside of the back 
cover for a list of all contact numbers and relevant web addresses.
This product is backed by a limited two-year warranty. An extended war-
ranty plan may be purchased from your dealer. When sending the projector 
in for repair, we recommend shipping the unit in its original packing mate-
rial, or having a professional packaging company pack the unit. An optional 
ATA shipping case is available for purchase that provides adequate protec-
tion for shipping. Please insure your shipment for its full value.Image not centered on screenMove projector, adjust zoom or lens shift on 
keypad, adjust heightCorrect image
Adjust horizontal or vertical position in 
Picture>Advanced menu 
						

							26
Using the keypad buttonsMost buttons are described in detail in other sections, but here is an over-
view of their functions:
power–turns the projector on (page 10) and off (page 16).
lens shift–shifts the projected image up or down
zoom–moves the projected image closer or further away.
focus–adjusts the clarity.
menu–opens the on-screen menus (page 31).
up/down arrows–navigates to and adjusts settings in the menus (page 31).
select–confirms choices made in the menus (page 31).
volume–adjusts sound (page 28).
video and computer–changes the active source. 
temp–alerts you to possible temperature-related problems (page 46).
lamp–alerts you to possible lamp-related problems (page 46).
Temp
menu navigation buttons 
						

							27
Using the remote control The remote uses two (2) provided AAA batteries. They are easily installed 
by sliding the cover off the remotes back, aligning the + and - ends of the 
batteries, sliding them into place, and then replacing the cover.
To operate, point the remote at the projection screen or at the projector (not 
at the computer). The range of optimum operation is about 30 feet (9.14m).
To use the laser pointer, press and hold the Laser button. The laser turns off 
when the button is released, or times out after two (2) minutes of continu-
ous operation.
WA R N I N G: Do not look into the laser beam emitted from the top of the 
remote control.
The remote contains four Source buttons that allow you to assign a particu-
lar input to a specific source. Simply press the numbered Source buttons to 
travel to whatever four sources you wish to have available. 
Press the remotes Menu button to open the projectors menu system. Use 
the arrow buttons to navigate, and the Select button to select features and 
adjust values in the menus. 
The remote also has a power button to turn the projector on and off, volume 
buttons and a mute button to control the sound, a backlight button to light 
the remotes buttons in the dark, and a video and computer button to switch 
between those two sources.
Two presentation-specific features are also provided. Use the blank button 
to display a blank screen instead of the current slide; use the effect button to 
invoke a user-definable action, such as freeze, PiP, or magnify.
The Auto Image button reacquires the computer image and the Presets but-
ton lets you customize the settings for each source. Up to three Preset set-
tings can be customized and saved.
Troubleshooting the remote Make sure the batteries are installed in the proper orientation and are 
not dead. The LED at the top of the remote lights when any button is 
pressed when the battery power is adequate.
 Make sure you’re pointing the remote at the projector, not the com-
puter, and are within the remote range of 30 feet (9.14m).
 If you are trying to control your computer ’s mouse, make sure a mouse 
cable is connected. If using a the USB cable that is part of the M1 cable, 
make sure the correct drivers are installed.
backlight button
navigation buttons
LED
source buttons
laser
button 
						

							28
Using the audio To play sound from the projector, connect your source to the Audio In con-
nector on the projector.
To adjust the volume, use the buttons on the keypad or remote.
To adjust the balance, or loudness, use the Audio menu (see page 35).
To mute the sound, press the Mute button.Troubleshooting audioIf there is no sound, check the following:
 Make sure the audio cable is connected.
 Make sure mute isn’t active. 
 Make sure the volume is turned up enough. Press the volume button 
on the keypad or remote.
 Make sure you are connected to the corresponding audio in for your 
source. Computer 1 and 3 share a single audio input. Computer 2 has 
its own audio input. Video 1, 2 and 3 share a single stereo input. 
 Adjust the audio source.
 If playing a video, make sure the playback has not been paused.Connecting external speakersThe projector can be attached to external speakers that have their own 
power source by plugging speaker cables into the projector ’s Audio Out 
connector. 
connect audio cable
volum
e
adjust volume
computer 1computer in
audio in
computer 2
computer 3audio in
computer 1 and 3
corresponding audio
computer 2 and
corresponding audioexternal speakersspeaker
cableaudio out 
						

							29
Optimizing computer imagesAfter your computer is connected properly and the computer ’s image is on 
the screen, you can optimize the image using the onscreen menus. For gen-
eral information on using the menus, see page 31.
 Adjust the Keystone, Contrast, or Brightness in the Picture menu. 
 Change the Aspect Ratio. Aspect Ratio is the ratio of the image width to 
image height. TV screens are usually 1.33:1, also known as 4:3. HDTV 
and most DVDs are 1.78:1, or 16:9. Choose the option that best fits your 
input source. See page 32 for details.
 Adjust the Color Temperature in the Advanced menu.
 Adjust the Phase, Tracking, or Horizontal or Vertical position in the 
Advanced menu.
 Once you have optimized the image for a particular source, you can 
save the settings using Presets. This allows you to quickly recall these 
settings later. See page 33.
Presentation featuresSeveral features are provided to make giving presentation easier. The fol-
lowing is an overview, details are found in the menu section on page 31.
The remote’s Effect button allows you to assign various features to the 
key. The default effect is Magnify.You can select from Blank, Mute, 
Aspect Ratio, Source, Auto Image, Freeze, Magnify, About, and PiP 
Source. See page 37 for details. 
 The Freeze effect allows you to freeze the displayed image. This is use-
ful if you want to make changes on your computer without your audi-
ence seeing them. 
The Blank button on the remote allows you to display a blank screen 
instead of the active source. See page 36.
 The PiP Source effect lets you change the video source in a smaller win-
dow on top of the computer image. See page 37.
 The Startup Logo menu option lets you change the default startup 
screen to a black, white, blue, or a custom logo screen via Logo Cap-
ture. See page 36.
 Two menu options, Power Save and Screen Save, are provided to auto-
matically shut down the projector after several minutes of inactivity or 
display a blank screen. This helps preserve lamp life. See page 35 and 
page 36.
 A Low Power menu option is also available to help lower the projec-
tor ’s fan sound volume. See page 35. 
						

							30
Optimizing video imagesAfter the video device is connected properly and the image is on the screen, 
you can optimize the image using the onscreen menus. For general informa-
tion on using the menus, see page 31.
 Adjust the Keystone, Contrast, Brightness, Color, or Tint in the Picture 
menu. See page 32. 
 Change the Aspect ratio. Aspect ratio is the ratio of the image width to 
image height. TV screens are usually 1.33:1, also known as 4:3. HDTV 
and most DVDs are 1.78:1, or 16:9. Choose the option that best fits your 
input source. See page 32.
 Select a Sharpness setting. See page 34.
 Adjust the Color Temperature. Select a listed value, or select User and 
individually adjust the intensity of the red, green, and blue color. See 
page 34.
Customizing the projectorYou can customize the projector for your specific setup and needs. See 
page 35 to page 39 for details on these features.
 For rear projection, turn Rear mode on in the Settings>System menu.
 For ceiling mounted projection, turn Ceiling mode on in the Set-
tings>System menu. 
 Specify which source the projector checks first for an active signal dur-
ing power-up. 
 Specify the function of the Effect Key on the remote. 
 Turn the projector ’s on-screen display messages on and off.
 Turn on power saving features. 
 Specify blank screen colors and startup logos.
 Specify the menu language.
 Manage your projector via ProjectorNet software. See page 9 for more 
information.
 Control your projector using RS232 commands. See page 9.
 Customize the projector for your specific installation using optional 
long or short throw lenses. See the inside back cover of this User ’s 
Guide for ordering information.
 Gain control of your projector from your laptop with InFocus 
ProjectorManager
, a free application that turns any PC into an 
advanced projector remote control.
ProjectorManager can be downloaded from our website link found on 
the CD that came with your projector.