Question about Optoma HD70 DLP Projector
The projector powers up like usual run about 10 minutes and then start flickering through the colors and then powers down and the light bulb indicator comes on what is wrong it work fine one day and the next its doing this sort of thing its less than a year old.
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
Hey Guys. I fixed my HD70. Here is what I did:
Take the Lamp Access panel off
Remove all screws on the bottom side
Remove the screws on the back IO Panel
Remove the front part of the case, be careful of the IR Cable
Clean out all the dust bunnies you find
Here is what I did extra that seemed to really work. I suspected that when the heat got up there, it would be looking track of where the color wheel was, hence the color flicker.
Find the color wheel, clean that off with your canned air, and make sure you also get the little IR sensor on the drum of the color wheel. If you clean that area up really well, like I did, it should resolve the color flicker issue.
I had the same problem everyone else did here, and I replaced the bulb, fiddled with the settings, and tried to cool it the best I could, but still had the curse session of the flicker. This did fix my HD70
Posted on May 12, 2009
solid red error light?
HD70 "die's" after few min with strage noise?
flickers different colors before complete self shutdown?
well try this....
Before replacing your bulb, fan or any other component try first cleaning your optoma realy good!! HD70 doesnt comes with any kind of filter so you can imagine the amound of dust can be.
The most importent thing is to blow away any dust from your color wheel + the sensor attached to it .
for farther troubleshoting clean your fan's.
there are 2 fan's insinde the HD70.
probably the most problems will be solved by cleening the color wheel!!
if the problem is not solved ,chack the lemp and the fans if they work properlly.
For fan replacing:
Fan Part number: GM1207PKVX-A
Posted on Feb 25, 2010
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
Two times this issue, both in summer (july 2008, now august 2009). Definitively, this problem comes from a malfunction of the RGB Wheel due to excessive heat and, probabily, dust accumulation. Turn on the "altitude mode" setting in summer can help (my projector is just working well now), but at the end it depends of the temperature of your room and if the fan can do enought to compensate it. Clean the dust can help the fan to refrigerate the system, that is all.
Posted on Aug 16, 2009
This seems to be a problem plaguing this model of projector, and I should have done research before I bought mine used off ebay for $450. It worked great for 3 months (about 300 hours), then it did the flickering thing after about 30 minutes. It seems like this model doesn't come with an air filter (not from my inspection, at least), so it's probably clogged with dust. I have not had time to take it apart, so I just duct taped an 80mm computer fan to the exhaust grill in the front, and it works great, and have had it on for hours at a time with no issues. Sure, it's loud as hell, but it's better than a broken projector, and I sit far enough away from the unit, with a loud enough sound system, that I don't notice. I might dissasemble it and clean it or buy and ultra-cool fan, but I don't really care.
I just found a 12volt power brick and spliced it into a computer fan, duct taped that to the projector, and now it's fine.
Posted on Mar 14, 2009
I had the same problem and phone a couple of places and they told me it was probably the colour wheel or it just needs servicing(very good clean) they told me this would cost about £65 for full clean. I did mine myself, this is not an easy job at all and you have to make sure you remember to plug all the components back in when rebuilding. It took me about 3 hours to do as I wanted to make sure I didn't break anything. I even cleaned the colour wheel and lenses but you have to be so careful. The picture has been perfect since.....GOOD LUCK.....
Posted on Dec 05, 2009
I had the same problem as dropped my hd70 and it kept flickering after 10 mins of viewing then shutting off i tried opening it took it outside it was a nice windy so dust was blowing everywhere from the machine i ot a straw and had a good blow at all the components lots of dust but no joy a couple of hours later tried the same thing and it is working perfectly now even better than before
Posted on Nov 13, 2009
Cleaning the colour wheel is definatly the answer ive had the same problem but now my projector is working fine. The colour wheel is located at the front centre of the projector incase you cant find it. Thanks
Posted on Sep 28, 2009
I had this same problem and still have a two year warranty so I sent it back to Optoma because of the color flickering. I changed the setting to high altitude before sending it and had little problems for a week. It then started flickering again. The problem they said was dust/cleaning. I tried cleaning it before with dustoff. The projector has been fine since. If your warranty is up I would suggest googling a way to clean the inside of the projector.
Posted on Feb 18, 2009
I am having the same problem. after searching online for the last hour, i found a suggestion to turn AI off and run the lamp in high mode for 5-10 hours. i am going to try this tonight when i get home.
Posted on Jul 01, 2008
We've tried all kinds of solutions, many of them were discussed here, but the bottom line is that there was something wrong with the device itself - something was causing a short circuit (probably when it was warming up a bit) and all these other solutions were like putting a bandage over it instead of healing it.
Our main problem was that every time we took it to the lab - they couldn’t see the problem (maybe cause the temperature there was much lower? who knows…), so as long as they couldn't see it happening, they kept sending it back to us, saying that everything is OK and we went back to Google this problem and try all these types of work-around that allegedly were solving the problem.
The last time we sent it to the lab, we left it in the showroom to run in a different environment and that’s when it finally happened outside of our living-room, and once the lab guys saw it happening, they managed to pin-point the problem and fix it.
So the bottom line is that you need a good technician and patience, cause there is a problem that needs to be fixed. Better ventilation might reduce the times it happens, but it doesn’t really solve the actual problem.
Posted on Mar 15, 2009
Yup...same probem here but luckily mine ran for around 2 years before experiencing the same problem. I will try the abobe mentioned suggestions and report back...
Posted on Nov 24, 2008
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Posted on Jan 02, 2017
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