Question about Optoma EP716 Multimedia Projector

8 Answers

Optoma EP716 lamp comes on for 10 seconds, then goes off.

Recently purchased a used Optoma EP716. The unit powers up, the fan comes on, and the lamp comes on for about 10 seconds then goes off. The fan and power light stay on. I tried putting it in front of a powerful fan (to see if it was temperature related) and it didn't help. I also took off the outer housing and put the fan on it to get more air flow, and still no change.

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  • soliver1101 Feb 02, 2009

    It's not the lamp. I finally found someone with a working EP716, and my lamp works fine in their machine.

    In watching the working machine, it seems that the lamp comes on fairly dim for about 10 seconds, then flickers, gets brighter, and the picture appears. With my machine, the lamp cuts out at that time.

    Any other ideas?

  • soliver1101 Feb 02, 2009

    Could it be the ballast?

  • soliver1101 Feb 02, 2009

    I've disassembled the unit, and there's no noticeable dust anywhere. The working unit has a LOT more dust in it than mine.

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8 Answers

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Ok, this is defiantly the temperature regulator. this is an integrated part on the circuit board. it may have been damaged by the previous user. sometimes the resellers only check to see if it works for just a sec then, they put it on the shelf like its new. this unit should of never been sold without this repair. the good news is, it is repairable but, you will need to send it to a local technician for hands on repair or, repackage and send to the manufacture for a rebuild. i would see if the store owner will either repair it for free or, refund your money. hope this helps:) thanks fo using fixya!

Posted on Feb 02, 2009

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Welcome to Fixya! Not one Person Asked you to Check the Balist for the Bulb. The Balist in your TV for the Bulb is Out and will need to Be Repaired. I would suggest an Authorized Service Center for this Repair. Please Rate My Response! Thanks!

Posted on Feb 02, 2009

  • Travis Humphries
    Travis Humphries Feb 02, 2009

    Absolutely. This is your Problem.

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You try other machine lamp in your projector and check it gives the same results ..if its yes there a problem in the unit itself you may need to get it serviced ..........as they are not user serviceable parts ...

Good luck...


Posted on Feb 02, 2009

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Hi... the faulty portion is not in ur light or in ur fan as u have clearly mentioned that it works in other devices.. So the major problem might be in ur unit...The reason may be due to some minute dust formation...TRy to clean up ur device and then try back...

Posted on Feb 02, 2009

  • Prakash Ram
    Prakash Ram Feb 02, 2009

    hi... so therfore the part where u would fix the bulb would have got repaired.. so its better to replace that rather than replacing a new bulb...


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Only thing that i can think of would be bad lamp driver board which would be located in the power supply circuit or a defective lamp from the manuafactuer . This sometimes happens where you buy a lamp and it comes defective right from the box.

Posted on Feb 02, 2009

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  • blueextc3221
    blueextc3221 Feb 02, 2009

    but you state it is not the lamp, so look at the driver board for any cracked solder joints which may seperate as it heats up. Otherwise, without a layout and parts list, it will be a complicated fix.

    From what I hear, OPTOMA is not keen on customer service.

  • blueextc3221
    blueextc3221 Feb 02, 2009

    Thanks for using Fixya - a Fixya rating is appreciated!!

  • blueextc3221
    blueextc3221 Feb 02, 2009

    If you do have access to a meter you could check the ballast to see if it's putting out enough voltage for the lamp.

    Also - I would suggest checking the fuse. There is an internal fuse... that on appearance may look good, byt after heating up - the element no longer makes contact due to thermal expansion.

  • blueextc3221
    blueextc3221 Feb 02, 2009

    Low Voltage DC Ballasts must generate the required voltages to start and operate the lamps reliably as well as to assure long life.



    The ballast may be obviously burned and smelly, overheated, or have a loud hum or buzz. Eventually, a thermal protector built into many ballasts will open due to the overheating (though this will probably reset when it cools down). The fixture may appear to be dead. A bad ballast could conceivably damage other parts as well and blow the fluorescent tubes. If the high voltage windings of rapid start or trigger start ballasts are open or shorted, then the lamp will not start.



    Ballasts for fixtures less than 30 watts usually do not have thermal protection and in rare cases catch fire if they overheat. Defective fixtures should not be left operating.



    Electronic ballasts including those in Compact Fluorescent Lamps (CFLs). These are basically switchmode power supplies and a total failure must be diagnosed with that in mind (including the SAFETY issues!). However, the most likely problems with mass produced and cheaply made electronic ballasts - especially when heat-stressed in enclosed or semi-enclosed fixtures - are cracked solder joints. Going over all the solder joints on these at the first sign of any flickering or other erratic behavior may prevent subsequent This is the only type of electronic ballast failure that it probably makes any sense to spend time on if your time is worth anything.



    Hope I was able to shed some insight on your problem.



    Thanks for using FixYa - a FixYa rating is appreciated!!

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Its the faulty lamp according to me so it doenot stay on for longer time.

Posted on Jan 17, 2009

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How to replace the lamp in 5 minutes with diagram and procedure
http://www.jangro.com/a/2006/08/03/how-to-change-your-samsung-dlp-lamp-in-5-minutes


just remove the lamp and reinsert the same lamp again and check out.if it still gives the same problem .then replace it with new lamp.

Posted on Jan 17, 2009

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Its the problem of the lamp and needs to be replaced.if the unit is new get it replaced.

Posted on Jan 17, 2009

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