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Infocus in74 projector model p740 had blown fuse on lamp driver board will i need new lamp and driver board?

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Posted on Jan 02, 2017

  • 16 Answers

SOURCE: InFocus IN74 Projector Fault

Hi there.

How many hours had it done? The bulb may have expired and as a safety precaution the projector will not switch on, otherwise the bulb will explode causeing further damage.


Posted on Feb 29, 2008

  • 2 Answers

SOURCE: sony vpl cx5 no voltage to lamp

I downloaded the schematics and drawings for $US9.00 and found what I thought may have been a thermistor turned out to be a fuse. Obtained one from Sony spares and it is now OK. If it is possible would you guys know the value of the fuse [amp/milliamps??] If you are familar it is fuse 2P connected to C board, it looks like a small lump of plastic or diode block. The cost of the fuse is outragous from Sony. I hope I do not have to replace it again. However, if I do I would love the valua and I could see if I could get one from Radio shack or someplace similar. If I was not retired I would buy one and put it on a step tranny and watch the ampmeter for the blow current. But, thats life when you decide to retire. I believe the voltage value is 3volts??

Would appreciate any feed-back on the value of the fuse.

And I hope this may help others

Thanks and Good-day


Posted on Mar 01, 2008

  • 1 Answer

SOURCE: sanyo plc xu 40 lcd projector problem

hi i have a infocus lp720 with new lamp but there red and green images all around the outside of things what is it and can this be fixed cheaply? thanks john

Posted on Jul 18, 2008

  • 6 Answers

SOURCE: Infocus In24+ driver?

IN24 does not require a device driver it utilizes the video display drivers built into the Microsoft Windows OS. You should be able to simply connect the PC/Laptop source to the input VGA connector on the projector then project.
Make sure to toggle your PC/Laptop to output out of the VGA port otherwise it will not send data to the projector

Posted on Nov 19, 2008

  • 2237 Answers

SOURCE: Infocus projector power supply dead

the caps dry out. look for bulging caps. you won't find a schematic for the ps boards. infocus had someone else make them. the problem seems more like a overheating issue. as for the other one with the "just the fans", check the colorwheel.

Posted on Sep 04, 2009

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When I turn the projector on, it goes about 2 minutes, the picture (lamp) flickers and then it shuts down. I can pull the power cord and when I plug it back in, it will start up again but repeates the...

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Just stopped working. No LED. Changes the Lamp no fix! ANy clues

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there is a fuse on the power supply, right on the power cord socket, but you need to remove the cover. but test this first: are there any leds on? if yes, it's not the fuse. check the lamp door and the filter cover on the bottom. it could also be the lamp is bad, the ballast is blown, the fans have stopped, the thermistor is blown, etc. if there are no leds, it could be that the power supply is bad. if you want to tackle this: remove the 4 bottom screws, then lift the top from the back, carefully remove the ribbon cable fron the main board (slide the cable locks on either side of the cable towards the front of the projector to unlock it first), unplug the wires in the front, and slide the lid forward over the lens. remove the main board off of the top (removing the 3 ribbon cables, all other wires, the cable nuts off of the back, and a few screws). the power supply is on the back side. if the power supply is bad, you can buy one from an infocus authorized service center (check the website).

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fuse on ac filter board. if that's ok, there is a power supply issue.

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Infocus projector power supply parts

you won't find schematics for them. infocus had their boards made by someone else who now no longer makes boards. it's usually the caps drying out that causes power problems.

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