Question about InFocus LP640 Multimedia Projector

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Infocus lp640 is broken. no lights. nothing.

As I was watching the presidential debates my projector just up and stopped working. I read your comment about fuses on the lp640 ,was wondering if you could give me a little more information.

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  • portico6 Feb 26, 2009

    I have the same problem - no lights, nothing

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Does anyone have a picture of how this diode looks like and where it is located, I got the power supply out and was testing things...

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Hello, If there is absolutely no sign of life at all just like it would look if it were unplugged...
The problem is a diode on the switching power supply at the rear of the projector. It's easy to fix if you know where it is. PS There is a 99.999% probability that the Diode is the problem and not a fuse..

Cheers

Posted on Jan 19, 2010

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body { background: #FFFFFF; margin: 0px; padding: 4px; font-family: arial, verdana, sans-serif; font-size: 10pt; } p { margin:0px; padding:0px; } .spwrap { background: transparent url(../wysiwyg_rte/misspell.gif) repeat-x scroll center bottom; } If you can, confirm the output of the power source! if you have +/- 0V on all outputs then you may have a defective schottky, verify if all 4 diodes on the secondary are ok ( you can spot a bad one by the short circuit on the 2 terminals).
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Good luck out there ,

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