Question about InFocus LP640 Multimedia Projector

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My Infocus LP640 displays a bright yellow octagon shape in the middle of the screen. It started small and now it has grown larger. Does the bulb need replaced?

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It means one of your lcd panels are burnt so now the lcd assembly has to be replaced.

Posted on Jul 14, 2010

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When turned on the projector lamp gives off a yellow color on the screen but later goes away and seems alright. Is this normal-----it never happened before in the 5 years I have been using it.


You probably just have to change the bulb n the lamp, if it has been over 5 years since that has been done, I would recommend it, as it will greatly improve the quality of picture coming from the projector

Jul 28, 2011 | InFocus LP640 Multimedia Projector

1 Answer

Lamp for LP640 in focus projector gives off yellow color tint on screen


the blue polarizer is most likely damaged due to overheating and old age.

Jul 28, 2011 | InFocus LP640 Multimedia Projector

1 Answer

My InFocus LP640 Projector Multimedia Projector's light comes on but not splash screen appears. Just sits there


try reflashing the projector with current firmware, if that doesn't work, you nvram chip or main board is bad.

Aug 29, 2010 | InFocus LP640 Projector Multimedia...

1 Answer

Yellow spot in middle of screen projection


this could have more than one cause, but the most obvious is a burn-in on the lens or dust on the lamp. either way it has to be replaced by a professional.

Mar 08, 2010 | InFocus LP640 Projector Multimedia...

1 Answer

How to disassemble an InFocus LP640


remove the top case, carefully unplug the ribbon cable from the main board, remove the 5 screws holding the board on, remove the 2 screws from the back (where the audio plugs are), and remove the 6 spacers from the vga/computer connectors. unplug all the plugs (be very careful unplugging the 3 ribbon cables in the middle. unlock the socket first by lifting up on the tab, then pull out the ribbon cables). remove the emi shield from the edge (metal clip with 5 fingers). remove the board!

Oct 30, 2009 | InFocus LP640 Multimedia Projector

1 Answer

Bulb not firing


yes. the lamps are good for 1500-2000 hours. with the projector on, go into the menu and find out how many lamp hours have accumulated.

Jun 24, 2009 | InFocus LP70+ Multimedia Projector

1 Answer

Infocus LP240 Projector


The bulb won't do that. What you're describing sounds like a light tunnel failure.

Feb 05, 2008 | InFocus Lamp Projector Lamp for LP240 [...

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