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whitsle433
Copper

Projector, clean dust off of main board

This should probably only be done if your warranty is expired. Dissembling a Dell Projector will void any existing warranty.

Personally I had nothing to lose, the projector wouldn't work and Dell wouldn't help me so I had a $1500 pile of plastic with no good use.
If your projector is flickering, the picture is jumping up down left and right, then it shuts down and the lamp light comes on, it is not the lamp! Don't let anyone tell you otherwise! Well, at least try this first.  For some reason dust on the main board causes this, sounds ridiculous but it's true. I have a 3200MP projector and just did this two hours ago and the projector is as good as new. 
 
For a 3200MP projector =

* Take the projector to a work room. This will get messy
* There are four very small Phillips screws on the bottom of the projector. Remove those
* There is one very small Phillips screw on the right hand side of the projector if you are looking at the projector from the front. Remove it
* Now flip the projector so it is right side up
* Remove the top piece of plastic. The bottom does not come off. Be careful. There is a ribbon attached to the top, so lean it against something while disassembled
* Use compressed air can and blow the dust out of the unit
* Take the lamp out and clean the glass lens
* Reassemble the projector

 
31 Replies
fett19
Bronze

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

Thanks for the info.  I will try this as I have dust in the lense area (see my previous posts...an soon to be post of how Dell has completely neglected my posts and issues) but my 3200 works ok otherwise.
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fett19
Bronze

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

You should post some pics to your post.  This would be very beneficial to all out there, especially to those that the warranty has expired and Dell will do absolutely nothing to help us once the warranty has expired.
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adidalax
Copper

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

Just FYI.....this could be due to dust getting on the actual DLP chip itself. The way these things work, that is all I can draw as the most natural reason for this issue.
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joe707
Copper

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

Great Advice!  Saved me big bucks on new lamp!!!!

Easy to follow instructions.  I wished I took pictures.  Thanks for the advice!

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tyarch
Copper

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

This is great advice, I was on my second projector, the first one I sent back for this problem, the same problem started with the second projector.  My warranty was up, so I was about to send out to be fixed.

I followed these instructions and now the projector is working great again, and has been for over a month.  All I can say is thank-you, you saved me a lot of time and money.  Dell should post this some where.

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dehartauto
Copper

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

Great Post!, Just fixed my 2300 from dust. Lamp warning light was on, with no lamp operation. Dust,Dust,  Who would have thought. My unit is 300 hours new,( about 3 months old): I was told to replace the bulb...Glad I read this post!!! Smiley Very Happy
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tomofwisc
Copper

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

How do i take my 2300Mp apart?
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mbrang00
Copper

ViewSonic PJ755D (flickering, lamp light coming on etc)

Dude.... You Rock.... I’m a bit new into the projector world and in my defense im a certified electronics tech. I would not have thought that the minute trace of dust that was built up would have reeked so much havoc.

I dont have a Dell projector but I did buy mine from Dell...I have a Viewsonic PJ755D that started to flicker. As I said...I’m new into the projector world so I was not sure of what to expect when the bulb went out. I was beginning to think it was the bulb because when I put in into "Econo-Mode" it got worse...

I did a little searching on Google and your post was like the 3rd or 4th hit. I did what you said and pulled it apart, (a little different than that of your model). As I was taking it apart I noticed that there was not a whole lot of dust build up ( I was beginning to think that this was going to be a futile attempt). I took the bulb out and pulled the top off to expose all of the electronics. Then I took it out to the shed to blow it out with the air compressor. I took the compressor to the control boards fans...everything that i could blow 90psi air too. Put it all back together and now it works like a charm....

For anyone who is reading this and owns a PJ755D here are a few things to look out for while doing this. Well Ill just write instructions:

1-Turn off the unit and allow the unit to finish its two minute cool-down, additionally, allow the unit to cool for another 25-30 min before doing the following...trust me.

2- Remove the small panel to expose the bulb assy, loosen the three Phillips screws and carefully pull the bulb assy out.(The three screws are captive and will not come off)

3-Place the Bulb on a tall shelf (away from Childs reach) about 10-15 feet away. This will keep you from accidentally knocking it off and destroying a 400-500 dollar light.

4-Using a long #1 Phillips, remove the 5 or six silver screws on the bottom of the unit. Watch out for the one right in the center, I missed that one at first.

5-After removing the screws (and placing them in a safe location) flip the unit back over so it is now sitting on its feet. Using only your fingernails the top should come off with little resistance. WARNING- there are two cables attached to the under side of the lid, be carfull not to rip them.

6- With the lid propped up on a book or something remove the ribbon cable by flipping the small brown lever up. The ribbon should come right out. (Mind you the contact pins on the ribbon are facing down; this will come in handy when putting it back together). The other cable is a (white) plastic connector like those found on sound cards in a computer. To remove just pull it out using your fingernails---Don’t pull by the wires....

7- BLOW BLOW BLOW...if your going to use an air compressor, be careful not to touch any of the "microchips" on the circuit board,(the electrostatic discharge caused by the moving air could destroy the chip and render the unit useless). Make no physical contact with any of the components on the circuit boards.

8- Flip the unit over and make sure you have blown out all of the dust from the inlet and the exhaust. The dust is evil...get all that you can because it apparently doesn’t take much at all to screw things up.

9- All done, Put everything back together, don’t forget about the two cables to hook up. Remember, the ribbon cable pins/contacts face down. The brown lever needs to be up while inserting the ribbon and is used as a clamp to secure the ribbon once it is in place.

10-Go get your bulb that is on top of the fridge or wherever you put it. plug it all back in and hopefully it worked for you too.


I hope this helps someone, it did me. Please if this takes care of your problem make a post to say so. I didn’t have a login for these forums before today. It took 2 min to sign up. Id likes to hear from you....


Mike

Message Edited by mbrang00 on 05-11-200610:24 PM

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lz0715
Copper

Re: FOR ANYONE WHO'S PROJECTOR IS GOING CRAZY!!! (flickering, lamp light coming on etc)

Thank you so much! This worked on my projector too. I already purchased a new lamp (on ebay so it wasn't too expensive) and the new lamp did not solve the problem. Since my warranty was over, I was sent by Dell to Optima service - I guess these are built by Optima for Dell. I told them the problem and of course, they suggested sending it in for service which was very expensive just to send it in and get looked at. Then they gave me a list of likely problems and the repair could easily have been in the $700 + range - so I opted not to send it in. I fugured there was no sense fixing an old technology projector and getting a 90 day warranty on repairs when for a little more I could buy a new projector and get an extended warranty. Since neither the repair nor a new projector were in my budget, I haven't used my home theater for months. There is no way I can spend a couple grand every 2 years for a new projector. I am so glad I found this post - hopefully it will last for a few more years! 
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