Question about Optoma EP721 Projector

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Hello my optoma ep782 turn on and the lamp too after 10 sec the lap turn off automatically but the projector stay on ,then after 10 sec the lamp return on automatically then turn on and off ... finally the led lamp appear thank you.

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

dhiman
  • 115 Answers

SOURCE: EP 757 Intermittent powering down

Pls check if the lamp is not so old that is giving the same problem. If lamp is almost new, then you can have a check with the Ballast unit card and then the loose connection in the Power supply or may be overheating and tripping.

Viren

Posted on Nov 19, 2007

SOURCE: Optoma EP719 lamp does not come on

Ok, so forgive me, I'm going by memory. Take the top cover off (4 screws on the side). Take the top silver shield off, look at the screws and only take off the ones you need. It's ok if you take more off, but its just more screws to track. You will need to take off the back outer cover. You will need to unscrew the hexagonal screws that the vga-out port uses to screw the connector to, as these are holding the back plate on. Once you get in, the board you need to look at is on the bottom back. Look for a capacitor that has a rounded top, not flat like the others. You will need to replace this with the same voltage and capacitance. Try an electronics site on the internet to get the right replacement if you cannot find it locally. Sorry for the poor instructions, but its just been too long. As a practice, take pictures as you go (during removal of parts) and you can use them to reinstall. Hope this helps as mine is still working.

Posted on Sep 09, 2008

  • 4 Answers

SOURCE: Optoma EP755 new lamp when power standby button

you need to reset the lamp timer, usually done by holding some buttons while turning on

Posted on Mar 10, 2009

vortash
  • 431 Answers

SOURCE: Lamp light is solid orange/red; No Image on screen when pj on

Sounds like bulb to me best way to check is take it to a service centere and they will use a replacement or test bulb to find out for you , it may not be your bulb it may be your ballast circuit . ... regards Vortash

Posted on May 10, 2009

vortash
  • 431 Answers

SOURCE: Flashing standby,power on,lamp lights with no fan

Most problems with the lamps are covered in the manuels for these projectors , however none user technical difficulties are not .. ie where it is needed to open the unit not recomended to the untrained as a screwdiver in the wrong place can cause irepairable harm let alone death ?
To check if it is your bulb simply take the unit to an engineer for an estimate usually free at least you will know whats wrong and can go from there .. and if you do have a working bulb an ebay replacement is probably the cheaper conclusion to your problem ... regards Vortash

Posted on May 10, 2009

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1 Answer

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if all lamp are red, and no light on, It is power supply issue,
you need to replace power supply, it will be ok.

you can send me your old power supply photos, perhaps i have same parts,

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The projector lamp life may have exceeded its safe limit, check your instruction manual, sometimes you have to hold the on or off button for 10 seconds to reset this. All manufacturers are different but that may be the problem.

Here is a copy of the manual, I havn't read it, my solution is from experience of other projectors.

http://www.myprojectorlamps.co.uk/projector-manual/Optoma/EP1690.html

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Lamp comes on briefly and then goes out


Check poewer connection
Check if fan filder is dirty ( if it is just hoover it out)
If "lamp" light on top of the projector blinks or stays lit - lamp probably faulty
How old is the Projector/lamp (average lamp life is around 2000-3000 hours)

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1 Answer

Hello. I have optoma ep716 with problem: 1. When I power it on the green blinking for 20-30 seconds and after this stays green. Due to manual it's meaning that projector on however lamp does not provide...


hi,
Do one one thing. check the lamp of your projector. For removing the lamp see the bellow picture.
also check the lamp colling fan. If it is faulty this fault can occur.

ajin_g_34.gif

1. Use a screwdriver to remove the screw from the cover.(1)
2.Push up and remove the cover.(2)
3. Remove the 2 screws from the lamp module.(3)
4.Pull out the lamp module. (4)
ok

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1 Answer

My Optima Projector flashes the red light on the Lamp & temperature L.E.D's at the same time. Power gets to it but after the LEDS flashing for some time, it automatically turns off then on again and...


Sounds like your bulb has gone.
Unplug it.
Clean all the filter.
Remove lamp and inspect it, check for darkness, cracks and if filament has blown.
If lamp looks ok, put back in and test.
Dont touch the lamp front glass with your fingers as this can damage lamp.


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Please dont forget to vote this answer was helpful

Many thanks

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Feb 15, 2011 | Optoma EP721 Projector

1 Answer

Ive just bought a new bulb for my projector (Optoma HD700X DLP Projector), taken the old one out and screwed this one in, but im still getting a read light when i turn it on, it sounds like it is...


Hello
if replacement lamp has done, was the lamp timer reset after replacement? and if the lamp is original, there is either a bad lamp or a cooling problem.
Good luck

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1 Answer

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It can have two problems. One is that the lamp has gone out and needs replaced. Refer to your troubleshooting section in your manual. Also can be bad capacitors in the power supply circuitry or Voltage Reg. IC. Either should be left to competent repair individual.

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1 Answer

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2 Answers

EP 757 Intermittent powering down


Pls check if the lamp is not so old that is giving the same problem. If lamp is almost new, then you can have a check with the Ballast unit card and then the loose connection in the Power supply or may be overheating and tripping.

Viren

Nov 18, 2007 | Optoma EP737 - DLP PROJECTOR - 1500 LUMENS...

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