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NEC LT240K remote stops working while in use

I have a ceiling mounted NEC LT240K that is connected to a 20' VGA cable and a dvd player via RCA cable. I have recently had an issue with the IR remote losing functionality while the projector is in use. The most recent event consisted of powering on via remote, a picture mute via remote after an hour of use and then the user was able to un-mute. The remote was also unable to power off or select the menu, but the laser pointer functioned and the batteries were fresh. I happen to have another LT240K remote to try and that one also didn't work. I checked the menu setting that allows you to enable/disable the projector IR sensors and all 4 sensors were enabled.

The last time this happened I tried reverting to factory default and the remote worked again. I have no custom settings other than the ceiling projection and a 5 hour power down.

Any suggestions?

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Clean it out. alot of times dust will block the sensors.

Posted on Dec 23, 2009

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