Question about Optoma EP716 Multimedia Projector

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Power problem I have an optoma ep716 and it doesn't power up. Looks like the lamp is fine. I can't find any burn marks on the board. The ballast looks ok but I don't know for sure. Does anybody think the problem might be the power supply. Maybe a voltage regulator? Has anybody else ran into this problem?

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  • 2 more comments 
  • BobSmalley Mar 10, 2008

    Yeah I don't see a glass fuse. I found a funny looking fuse almost looks like a cap I guess thats why I missed it. ** continuity. Don't I feel like a dummy.


  • BobSmalley Mar 14, 2008

    Does anybody know of a cross refrence for part number STK392-010 it's a 3 channel convergence chip for a 47" samsung DLP television?

  • BobSmalley Mar 20, 2008

    Thanks for your help Tampa!

  • John Jones May 23, 2008

    I am having the same problem with no power but I am not as handy with electronics. I can't find the fuse. Can someone tell me where to find it and how to replace it? Any help would be appreciated,

    John Jones



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Hello BobSmalley,
From your post, I gather that you know your way around electronics. So, why don't you use a VOM (Volt Ohm Meter) to trace power starting at the PS and see where you lose it. You may find a blown fuse along the way as you didn't mention fuse status (and that projector surely has one). If you do have access to a meter you could also check the ballast to see if it's putting out enough voltage for the lamp. But since you stat that it doesn't power up at all, I would lean towards the Power Supply (PS) and locating the fuse (could be an AGC, etc... or a printed circuit fuse soldered in circuit right on the component side of the board near the edge where power comes in).
Keep us posted, and Good Luck.

Posted on Mar 10, 2008

  • Frank  Fernandez
    Frank Fernandez Mar 11, 2008

    I'm glad you found the open in the circuit. :)

  • Frank  Fernandez
    Frank Fernandez Mar 19, 2008

    I appreciate your thanks, but would more so appreciate a rating?



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