View Full Version : HD70 flashing colors then shuts off


danieloneil01
07-07-09, 11:14 PM
I've tried other inputs and it still does the samething. The bulb has 400 hrs on it so I popped in my other one I took out that has 3000 hrs and it still did the samething. The colors will start flashing solid colors like purple, red and etc. It'll flash them faster and faster then will shut off and the orange light will come on. If I unplug the projector then restart it it'll run fine for about 5min then do the samething.

I tried searching on here and on google but only a few posts come up with either no response on how they fixed it or they had a loose connection. I really don't have the money to get a new PJ but it sux because it was my main tv.

EDIT: Also the old bulb or atleast when I put it in had two black dot like things on the screen coming from the projector. Could it be finger prints? And when I stuck the new one back in I noticed they were still there but weren't before I took it out.

Sheridan1952
07-08-09, 12:25 AM
Your problems are NOT caused by the bulb. Lamps will NEVER cause any anomalies or color problems in the image. The only problem they will exhibit (other than outright failure) is reduced brightness/contrast.

And there is no way that any spots on the lamp would show up in the image. The light is unfocused at the lamp. It isn't focused until it goes into the imaging chamber. That is where any dust will show up in your image. Somehow, dust got into the imaging chamber while you were changing the lamp. And the only way to get to it to clean it out is to open the projector.

As far as your flashing colors, that is the color wheel failing. The only cure is replacement. Last time I checked, the part was about $160 plus shipping. Plus labor if you don't do the repair yourself.

Added..before I call those "two black dot like things" dust, you need to look at them. If they are indistinct and irregular in their shape, then they are dust on the optics inside the imaging chamber. HOWEVER, if they are very regular, square and clearly defined by the "screen door" grid of the DLP chip, then you have failed pixels on your imaging chip and that is NOT repairable.

danieloneil01
07-08-09, 08:07 AM
So should I just send it in to get fixed or is changing the color wheel not hard? I opened it all the way but this is was done after the dots were there and not before. But I did take a large garage vaccum and switch it to blow to get rid of the dust in the projector. Maybe some dust balls got in there.


And if the dots can't be repaired then I'll just have to live with it.

And thanks for the help.

Sheridan1952
07-08-09, 08:58 AM
If it is still under warranty, send it in.

danieloneil01
07-08-09, 07:06 PM
I've had it for 2 or 3 yrs. I'll see if I can find the part for it and try the install myself.

Sheridan1952
07-08-09, 07:19 PM
The cost on that part is about $160. If you do find it, be extremely careful putting the new one in as they are easily broken.

danieloneil01
07-08-09, 07:36 PM
The cost on that part is about $160. If you do find it, be extremely careful putting the new one in as they are easily broken.

I found one (you'll probably see the other thread)

If anyone needs to know. The part # for the Color Wheel is

70.85S22GR01

Their number is 408-383-3700
Mod can lock this or merge it to another thread.

chumpchange21
07-09-09, 05:57 AM
Dust, haha. That's why I stick with DLP's

Sheridan1952
07-09-09, 08:40 AM
His projector IS a DLP. What part of "color wheel" did you miss? LCD units don't have color wheels.

And just so you know, DLP's are NOT immune from dust. They just have fewer optics that can be affected by dust.

Dust, haha. That's why I stick with DLP's

danieloneil01
07-09-09, 11:28 AM
LOL I was about to post the samething.

jpad
07-10-09, 07:56 PM
You may want to open up the unit. There are 2 fans inside, that may need cleaning. I had a similar problem a few months back. After a good cleaning all has been good.

PFRboy
07-11-09, 09:57 PM
IS it doing something like this (http://video.google.com/videoplay?docid=8380456047913847125)? I sent my HD70 in to Optoma, thinking it was a colorwheel issue, but they simply cleaned my unit and now it works fine.

jarrod1937
07-11-09, 11:05 PM
IS it doing something like this (http://video.google.com/videoplay?docid=8380456047913847125)? I sent my HD70 in to Optoma, thinking it was a colorwheel issue, but they simply cleaned my unit and now it works fine.
That is still a color wheel issue. Without a color wheel a single chip dlp is black and white. So if you have color problems like flashing or no color, it is either the color wheel or something in the path that drives it.
In your case, if a simple cleaning fixed it, it more than likely was too much dust blocking the color wheel sensor. A color wheel has a black strip on the motor portion which a sensor reads, this allows the controller to properly time the color wheel. And its a sensor which if it goes bad or gets blocked, will cause the color wheel to fall out of sync.
But truthfully thats only if you're lucky, most of the time this issue is caused by bad bearings that cause the wheel to fall out of alignment every once in a while. A condition that eventually leads to the color wheel failing.

chumpchange21
07-14-09, 04:30 AM
Wow... I must have over read that part. I apologize. Come on guys the excess animosity is not needed = )

Sorry for the newb response, but I never had dust problems with my unit = /

Fine, I meant to say less, but either way, my mistake for not reading color wheel.

danieloneil01
07-14-09, 08:59 AM
IS it doing something like this (http://video.google.com/videoplay?docid=8380456047913847125)? I sent my HD70 in to Optoma, thinking it was a colorwheel issue, but they simply cleaned my unit and now it works fine.

Well I didn't click the link but I took it completely apart to clean it before the color wheel came because I simply cannot live without it and thought it might fix it. And to my surprise it hasn't done it since and I've put 10hrs on it.



So here's the messed up part. I get the color wheel in yesterday. I took the projector apart this morning to put it in. Take the old one out, and I'm still wondering why they didn't include the circuit board on the new one. Well I take it off the old one and putting it on the new one trying to avoid touching the wheel with my man hands (sorry but trying to grip that without having hobit or childish hands is pretty hard).


And I drop it about 6" to the table and it shatters 2 of the colors. Is it possible to change out just the motor? Otherwise I just threw 200 down the toilet.

Hopefully the old color wheel lasts awhile.


Wow... I must have over read that part. I apologize. Come on guys the excess animosity is not needed = )

Sorry for the newb response, but I never had dust problems with my unit = /

Fine, I meant to say less, but either way, my mistake for not reading color wheel.


LOL, animosity? Really? Sheesh

Sheridan1952
07-14-09, 09:13 AM
Sorry to hear that, not good news. I have tried to remove the color wheel assembly without any luck. All I accomplished was to destroy the wheel. Fortunately, I had been experimenting with a bad unit so there was no loss.

jarrod1937
07-14-09, 03:04 PM
And I drop it about 6" to the table and it shatters 2 of the colors. Is it possible to change out just the motor? Otherwise I just threw 200 down the toilet.

Well, lets just hope that the only problem was dust on the sensor. If it was bearing problem you're out of luck.
When i examined a spare color wheel (thus i could do anything to it with no worry) i found they're near impossible to take apart to swapout motor internals/the motor itself.