Originally Posted by Sdallnct
So I got new bulb in today. I took down pj to discover the old bulb had exploded! Is that normal? I carefully removed all the glass I could find.
I put in new bulb unit and now unit will not power up at all. Any suggestions?
I had the exact same problem, and after reading the threads, I found Tyro's advice/solution to be perfect. If anybody else has had problems with the HD70 not powering up after replacing the lamp, be cautious and careful before sending it in for "repairs". Here is the long version of what happened to me:
While playing Left4Dead, in the midst of an attack by the zombie horde, my bulb *POPPED*. That in itself was scary, but I felt more dread at the thought of replacing the lamp. I could smell smoke so I knew the bulb exploded - I immediately unplugged the pj.
When the new lamp came in ($268 w/shipping from Provantage), I opened up the Optoma HD70 and the new lamp went in without incident. I screwed the lamp in and then the lamp covering. When I plugged in the cord, nothing. The green standby LED light that was supposed to light up did not light up at all. Of course I felt a freak out coming. So I slept on it.
The next day (today) being New Year's Eve, I found technical help by phone hard to reach at Optoma. My email query had not been replied to yet. The two local A/V shops, as well as a very helpful rep from Projector People, all told me the same thing: if you are not seeing any LED's at all, you have a minor/major power issue and the pj needs to be serviced/sent in for repair. I asked if it could be a bad lamp, and they correctly answered no, even with a bad lamp you should still see the power up lights when plugged in. I figured now was a good time to check the AVS forums.
Thank God for the forums. When I saw Tyro's reply in #2294 (pbm was aligning the lamp cover with the slot that pushes the metal tab), I felt a glimmer of hope and went back to the pj. Sure enough, when you unscrew the lamp cover, you notice a plastic tab behind it that is supposed to push aside a metal tab that *clicks* and tells the pj all is good and secure. I clicked the tab with a pencil and checked the lights - bingo! I saw red then the green blinking standby LED!
Problem was, I reseated and closed the lamp lid over 20 times and it would never trigger the switch, leaving the pj powerless. My wife saw me tinkering, came by and MacGyver'd a bread tie (wire and plastic) against the metal tab, closed the lid, and now I'm back in action. I really need to know if anybody else had this much trouble closing the lamp cover properly, or maybe the lamp explosion messed up the metal tab enough to cause the issue. Anyway, Optoma tech got back to me and told me to send in the pj. They knew the whole story and never mentioned it might be as simple as the lamp cover lid not activating the metal switch inside. Oh yeah, the lamp hours of that first bulb were 4,491 - it was dim near the final days but still very viewable and sharp. I've had the HD70 since October of 2006.