Question about Office Equipment & Supplies
Why won't my projector turn on when prompted to? The only thing that happens is the power button starts to flash orange and the status button flashes red. The bulb button does not flash or turn on. I hear a fan/motor turn on but that's it.. Can someone help please?
So glad to find a posting regarding this issue. I too have a NEC LT 170 that I <3 and when used the first bulb to the end of what I thought was its life got another. Smiling for months as I watched and enjoyed the big pictures on my Living Room walls. Then it stared, or i should say stopped starting.
Since I had laid out the Living room around it, surround sound and all, Iwasn't about to just give up and the compact nature of the projector made me not want to. Patiently I looked into it. I found that the bulb has a capacitor that fires high voltage to begine the arc that vaporises the mercury. I removed the bulb examined the contacts safety glass reflector and found them all to look well. reassembling the Bulb worked!!! Then same week end didn't, Repeted the proceedure thinking loose contact to capacitor?(could hear the high frequency of the capacitor firing, once, twice, three times then the flashing light of Malfunction.
Now My wife is not the fixer in the house though when we were dating we had a beta projector that wasnt working and I was about to take it apart when she said "let me show you what I do" and walked over picked it up and gave it a ittle spank on it's bottom. fliped it back over and pressed plat and all was well. Ever since whenever i am at my technical wits end before i get the hammer I flipp it over and give it a swat. Well it's been a year now and I am embarrassed to say I don't have a better solution though I have refined my understanding.
There is a third contact that is energized by the capacitor to vaporize the condensed mercury in the cold bulb. when I turn it; lense down and give it a slap on the non chord side near the rear (back side by bulb) only while i hear the Capacitor fire (high pitched PEWWW). This shakes the small droplets of condensed cold mercury around the contact that is attempting to arc through them to make the gas that the primary filament fluoresces. Some times I get it on the first try. others on the second or third. Then if I unplug I can try again.
Have you ever noticed on your winshield how the dew covers the whole thing and then as you drive it rolls off in droplets. This projector was designed to be moved alot and the problem only shows up when the cold projector isnt moved and the condensed mercury isn't collected around the firing filament. Rolling and slapping the cool projecter rolls a ball of mercury around collecting all the little balls together to where they can then be vaporised by the capacitor and start the fluorescent reaction.. The permanent fix to this is to redesign the bulb with more mercury.
Posted on Feb 20, 2011
The colorwheel may need replacing.
Posted on Dec 23, 2009
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Posted on Jan 02, 2017
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