Question about InFocus LP640 Projector Multimedia Projector

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PowerPoint and Projector (InFocus LP640) Incompatability

I have a Sony Vaio with Windows XPsp2 and PowerPoint 2003. When I try to hook up the laptop to the LP640 projector it will work momentarily but then automatically reboots the computer. It will just continue through this loop of working for a few slides...rebooting...working...etc. Is this a PowerPoint issue, a Vaio issue or a projector issue? Any solution/ideas would be greatly appreciated. Regards, Melissa

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Re: PowerPoint and Projector (InFocus LP640)...

I am unsure of this from your post, but don't try to hook the projector up to the laptop while either one of them is on. Power both the laptop and the projector off, hook up the projector to the laptop, then power on the projector first then the laptop. If you are already doing this, I apologize for stating the obvious.

Posted on Jul 29, 2007

Re: PowerPoint and Projector (InFocus LP640) Incompatability - InFocus LP640 Projector Multimedia Projector Multimedia...

How about updating the display driver?

Posted on Jul 07, 2008

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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...

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First time using infocus 1x projector with this laptop - installed drivers but there is no start up screen on the projector and will not display laptop image.

You have to tell the computer you hooked up an additional external monitor. Lower left on the keyboard you will see a "FN" key. Across the top, your F keys...look for an icon that looks like a monitor. Usually F5, F7 or F8. Hold down the FN key and select the F5 etc key which is the command to display the image through the external port. Doing this once displays image through the projector and laptop. Twice displays image to projector only and three times returns to display only on laptop again.

Jun 19, 2010 | InFocus LP640 Projector Multimedia...

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Infocus lp640 lcd projector

check vga cable(cable between computer and projector)-try fn key with combination of f4orf5 orf6 or f7 or f8-confirm that input source assigned to pc.

Jul 08, 2008 | InFocus Multimedia Projectors

1 Answer

LP 640 projector not able to display 1080p

Hello, The LP640 will NOT down-convert 1080p
1080i is the max it can down-convert.

As far as the DIGI input, it is not DVI... It's a proprietary
InFocus format they call M1-D P&D and is NOT HDCP compatible. I have several LP640 manuals, some quite old and none of them claim that 1080p is a valid resolution. interesting that your manual says it is... very odd indeed.

Good Luck!


Dec 15, 2007 | Optoma Projector Multimedia Projector

1 Answer

LP 640 projector not able to display 1080p

The specs of the LP640 show that the maximum resolution it can handle is 720p. You are trying to make the projector do something it cannot handle

Oct 02, 2007 | InFocus LP640 Projector Multimedia...

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