Question about Optoma HD70 DLP Projector
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Posted on Jan 02, 2017
SOURCE: HD 70 DLP Projector problem
I HAVE A HD72 DOING THE SAME THING, I PUT IT IN HIGH ALTITUDE MODE(WHICH MAKES THE FAN RUN FASTER) AND IT STOPED THE PROBLEM. I READ THAT DUST COLLECTS ON THE FAN AND IT DOESN'T CIRCULATE THE AIR, HEATING UP SOME OF THE CIRCUITS MAKING THEM NOT WORK CORRECTLY. I AM GOING TO CLEAN THE FAN AND I THINK IT WILL FIX THE PROBLEM
Posted on Aug 14, 2008
SOURCE: HD 70 DLP Projector problem
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 like most of you... first I bought the $300 dollar bulb... put it in and 10 minutes later it was doing the same thing flashing through the colors. So trust me.
There are 4 screws on the back. Take these out.
There are 2 small nuts on the back around the VGA input. Take these out.
There are about 5 screws on the underside (think one was on the bulb changeout portion). These have long copper colored bars that go all the way from top to bottom.
All these have to be removed. Then you can take it apart. AND I PROMISE YOU WILL SEE TONS OF DUST ALL OVER.
Make sure you blow out the parts between the circiut boards AND the fan unit.
Put it back together... and remember to make sure that little latch on the bulb change cover makes the click sound ( it is a switch that must close or the unit will not power back up )..... and it will work great again.
No need for a huge fan next to it. Although I will admit that is an excellent idea.
I did this 3 weeks ago and have been watching it with no issues.
If you do not feel comfortable taking the screws out yourself..... I would take it to your local TV repair store and just ask them to take the covers off and blow out all the dust... and give it back to you. No troubleshooting... no repairs... no replacements... just blow it out.
I was an electronic technician in the US Navy for 10 years... Now I work at a nuclear power plant in Illinois. BUT I PROMISE with a good phillips head screw driver and a small crescent wrench you can do this yourself.
Good luck and you are welcome. I know how frustrating this issue is. But this is the fix.
Posted on May 13, 2009
SOURCE: Powers off
clean out the projector with canned air. dust keeps in the heat the projector is trying to expell. once it's blown out, check the fans to make sure they are spinning.
Posted on Nov 16, 2009
This is a very common problem with these projectors. The fans lock up and the units are out of warrenty. The fan you replace it with must be the exact same as the old one, even though it is the same as a 5$ computer fan. The processor will detect the non-dell fan and shutdown in the same way.I Havent been able to find any replacement fans that will work. I may be interested in buying your broken projector from you if you give up.
Email me at: nalexandrov251[A-T]gmail.com and we might be abe to work something out.
Posted on Dec 08, 2009
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