Question about Optoma EP739 Multimedia Projector
Bulb replacement did not work I figure it might be a fuse that relays power to the bulb
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: No Power
The problem with the bulb cover interlock(safety switch) tab is that it is molded with the plastic cover. When these projectors are ceiling mounted upside down, the heat from the bulb melts the interlock tab and causes it not to actuate the interlock switch.
If you push the switch arm in you can hear the switch click. The fix I did on my projector was to bend the switch arm so that it stays actuated. You can use a small set of needle nose pliers or two small screwdrivers. be careful to only bend the arm in the middle, if you break the arm from the switch, you will have to go in and bypass the switch.... Just be carefull...
After you bend the switch arm try to press it in, if you did it right you won't hear the click. install the lamp, cover, and your done.
Posted on Apr 14, 2009
The problem is not over-heating. The Optoma HD72 has a known problem that Optoma won't advertise. The lamp driver is faulty. They simply have to replace the lamp driver. I purchased a spare lamp with my original purchase. I had the exact same experience as you at around 1200 hours on the lamp in ECO mode. I used the spare lamp. Same thing happened at about 1200 hours. I had a friend at Optoma. he confided to me the problem. I sent it in and they replaced the lamp driver at no charge. I got another 800 hours out of the first lamp and am now using my second lamp and have about 600 hours on it. The pic quality is so good with this projector (used Digital Video Essentials to calibrate) that I'll just order a bare lamp or two and use the existing lamp housings when I need a new bulb.
Posted on Jun 19, 2010
In order to reset the bulb counter you need to access the Service Menu:
To access the Service Menu:
Turn on and warm up
press the following sequence:
Give it a few goes, it took me 5 minutes to enter with the right timing. The Service Menu will appear, highlight factory reset and the counter goes to 0. Job done. Cheers, Matt.
Posted on Jan 28, 2011
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