Question about Optoma GT700 Projector

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Bulb blows on gt700

I am now on my 3 bulb in 3 months on my Optoma GT700 projector. Is there a known problem with this projector?

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  • 24 Answers

Possibly a bad ballast or power supply going to it causing it to either kill the bulb or your old bulb may still be good. Did you rest the counter in the menu for the bulb life after replacing?

Posted on Nov 05, 2012

  • Greg Winters Nov 05, 2012

    Yes, I have reset the counter every time I replace the bulb

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Posted on Jan 02, 2017

SOURCE: dvd10 optoma projector makes a loud noise

Hi, I'm not sure if it's the same problem I had..
I had it on picture mute, for maybe 15 mins, which may not have been a good idea. While it was muted, it made a sparking sound, and then a very loud grinding noise. When turned off, the lound noise stops, and the fan continues as usual for about a minute. As soon as it's turned back on, the grinding noise is back. But the logo seemed to display ok.

I took it in for repairs, and they said they needed to replace the color wheel to fix the problem.

optoma dv10 mode

Posted on Nov 03, 2008

  • 2 Answers

SOURCE: Short picture time when starting Optoma HD72 projector

Mine did the same thing. The bulb is used up...replace the bulb. That fixed mine, working great again.

Posted on Jan 01, 2009

  • 2 Answers

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. 5e5b596.jpg 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...
c0cb930.jpg 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

  • 6 Answers

SOURCE: optoma hd70 blowing lamps

Hi, My name is Doug Stanko.
I had the same issue and fixed the problem.
All you have to do is take a few screws out..... and blow out the inside VERY well with pressurized air. I have a compressor... and I set the regulator to 50 psi. But the KEY IS TO have the covers off so you can get between the circuit cards and blow them out. They were incredibly dusty. Even after I blew through the side vents.
I agree with all of you that say it is overheating. You are right. There was so much dust on the fan blades them selves... I'm suprised they were still spinning at all.

((And I would not be suprised if your fan is no longer spinning at all. Try this fix... but if you do not hear the fan blowing air through your unit after you have cleaned it out... get a new fan... very cheap part... and you will know how to take it apart after you read the rest. Good Luck.))

And like most of you... first I bought the $300 dollar bulb... put it in and 10 minutes later it was doing the same thing flashing through the colors. So trust me.
There are 4 screws on the back. Take these out.
There are 2 small nuts on the back around the VGA input. Take these out.
There are about 5 screws on the underside (think one was on the bulb changeout portion). These have long copper colored bars that go all the way from top to bottom.
All these have to be removed. Then you can take it apart. AND I PROMISE YOU WILL SEE TONS OF DUST ALL OVER.
Make sure you blow out the parts between the circiut boards AND the fan unit.
Put it back together... and remember to make sure that little latch on the bulb change cover makes the click sound ( it is a switch that must close or the unit will not power back up )..... and it will work great again.
No need for a huge fan next to it. Although I will admit that is an excellent idea.
I did this 3 weeks ago and have been watching it with no issues.
If you do not feel comfortable taking the screws out yourself..... I would take it to your local TV repair store and just ask them to take the covers off and blow out all the dust... and give it back to you. No troubleshooting... no repairs... no replacements... just blow it out.
I was an electronic technician in the US Navy for 10 years... Now I work at a nuclear power plant in Illinois. BUT I PROMISE with a good phillips head screw driver and a small crescent wrench you can do this yourself.
Good luck and you are welcome. I know how frustrating this issue is. But this is the fix.
Doug

Posted on May 13, 2009

  • 2 Answers

SOURCE: OPTOMA HD70 projector turns off in a few seconds

my 3m projector turns off as soon as it is turned on

Posted on Mar 29, 2010

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Hi there

Keep in mind that this is only a estimate - not true hours at all.

Does your Projector go in for a service every 3 months ?

If I were you I would take back the Projector to the dealer you purchased it from and ask them to test your Ballast ( lamp's powersupply)

Did they tell you to run in your new lamp for 12 hours straight ?

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