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Pull the batteries out and let it sit for a few minutes.
replace the batteries.
If that didnt help, than a button may be forced in the pressed position.
You may have to put it apart and see if there is anything lodged in the keypad.
Not all models of projectors have the remote focus built into them. Remote focus is a feature that designed & built into the projector, not the remote. So if the remote has a "Focus" button, it won't work if the projector is not so equipped. If it is the correct projector model and remote combinations, there could still be conditions causing it not to work, such as: projection lens not installed correctly; gear teeth that drive the lens broken off (some or all); electronics that control the remote function; remote not plugged in correctly (a remote will only work if plugged in the correct orientation of the 5-pin plug) and finally the remote control, itself. Lots of variables. Try troubleshooting in the order I have listed. Good luck !! Jim
Make sure that the battery is in good working condition and charged before it is totally discharged. If not replace the battery. Unfortunately the program may be lost. Or you could see if it's backed up on Logitech's website. Try updating the remote and see if you can recover that way.
2 common causes of malfunction remote control... first,is low battery or empty...if you have a multimeter tester set it to dc and check the voltage of your battery if it is on empty or low battery condition replace it
and secondly,when the infrared is defective...how can you determine?..if you have any digital cameras get it and point it to the top view of your remote then try to look the infrared bulb (LED)then press any button to activate the remote after look at your camera while pressing the remote if you see infrared lights up for every pressed..your remote is OK..if it is not lights up and your battery is good..replace the infrared to fix your problem
The remote you have is an expensive item to replace so lets try checking a few things first. Open the battery compartment and closely look at the contacts, there should be one at the top and bottom of each battery. If the remote was not used for a long period of time with the batteries still in the remote, then some corrosion may have built up preventing good battery connections... clean the contacts if you suspect this. Hope this works for you.