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Vertical lines on my Optoma HD20

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  #1  
Old 21st June 2010, 10:52 PM
 
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Unhappy Vertical lines on my Optoma HD20


Folks -
I've been using an Optoma HD20 for about 60 hours with stunning results. I finally setup my home theater and mounted it on the ceiling. The other day I tried to adjut the PJ position to align the image on the screen and I started getting thin vertical lines on the screen. Its one pixel thick black line that runs the entire height. There are about 15 odd lines spaced 2" apart across the entire screen.
I turned of the PJ and checked the next morning and the lines were gone. The next time I turned it on, they were back.
A day later, I turned on the PJ and the lines were back, but they went away on thier own after a few minutes of viewing.
When the lines come on, its irrespective of source and even when there's no signal.
Question:
1. Could my adjusting the PJ have inadvertantly caused mechanical failure somewhere? I think these DLP boxes are very sturdy and since I've not bumped it or dropped it, I suspect mere hand adjustments cannot be the cause.
2. Is this a firmware issue which I can resolve by simply upgrading the firmware (through the service port? Is it user upgradable?)
3. Could there be a grounding problem that has caused this?
4. Can I use a voltage stabilizer/ power conditioner/ spike buster to clean up the power if thats what's causing the problem?

Thanks for helping me here... Its a $1000 purchase and with less than 60 hrs on the lamp, I just dont want a DMD failure!
Regards,
navinmra
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Old 21st June 2010, 11:21 PM
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Re: Vertical lines on my Optoma HD20

change the power cable and see..

could be a loose connection causing an occasional spark
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Old 22nd June 2010, 09:26 AM
 
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Re: Vertical lines on my Optoma HD20

Thanks kapvin.
I turned it on last night and there were no lines! so I just hope that was a bad dream
navinmra
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Old 22nd June 2010, 11:51 AM
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Re: Vertical lines on my Optoma HD20

Quote:
Originally Posted by navinmra View Post
Thanks kapvin.
I turned it on last night and there were no lines! so I just hope that was a bad dream
navinmra
you are welcome.

make sure that the powercable is securely fastened. unclean power can create a nightmare that you would really not want. if the cable is fine, check the wall connection.

I assume you have some amount of power conditioning between the wall socket and the PJ?
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Old 22nd June 2010, 04:07 PM
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Re: Vertical lines on my Optoma HD20

what kind of lines where they , is it the kind that u get when there is bad voltage/fluctuation on a tv ----then it cud be some electrical interference

if u say that it comes and goes u cud also suspect some kind of dust/foriegn body inside the PJ which cud come and go as and when the fan inside the PJ functions
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Old 22nd June 2010, 05:28 PM
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Re: Vertical lines on my Optoma HD20

Quote:
Originally Posted by subhash View Post
what kind of lines where they , is it the kind that u get when there is bad voltage/fluctuation on a tv ----then it cud be some electrical interference

if u say that it comes and goes u cud also suspect some kind of dust/foriegn body inside the PJ which cud come and go as and when the fan inside the PJ functions
subhash, i think the Optoma has a sealed light path.

It's probably electrical interference, or a defective power cable.

if you get the lines again, try unmounting the pj and using the original cable for a bit and see if the problem persists

of course, the worst case is a manufacturing defect (though unlike to show up after 60hrs, most times they show up int he first few hours).. NavinMRA, did you buy with an Indian waranty?
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Old 22nd June 2010, 08:13 PM
 
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Thumbs up Re: Vertical lines on my Optoma HD20

Well no I did not buy it with the India warranty - I walked into B&H in New York and picked it up.
So I'm going to do exactly what you guys said - check on the power cable. I may have tugged it inadvertantly. Put my old spike buster back, check for any foreign body that the fan is throwing around and come back to you with results.
As for now, the piece worked fine and I am hoping as long as I leave the cords untouched, I am doing good.
Thanks guys - great to have so many of you come in with your tips. Feels like home on this forum!
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Old 26th June 2010, 08:49 AM
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Re: Vertical lines on my Optoma HD20

Just ensure that the power and hdmi cables are not running next to each other as it may cause interference also. If the issue reoccurs, disconnect all the input cables and just leave the power cable connected as it will help you in isolating the issue.

Also from personal experience use the power cable the came with the projector as local cables may not work, when i got my PJ it would turn on green light will come and go off. As soon as i switched to original cable the problem went away.
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Old 6th July 2010, 02:13 PM
 
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Re: Vertical lines on my Optoma HD20

Folks I seem to have solved the problem - at least for now. I called the Optoma service center and explained the problem and that it was an on and off recurrence. He suspected a color wheel problem. I dismounted the PJ and heard some strange noise like a loose screw going around in the PJ... I suppose it was touching the color wheel and causing the problem. I tilted the PJ around till I heard no noise and reconnected the PJ and voila! no vertical lines!
I know I need to someday open the PJ at the service center and remove this foreign object but for now the problem is gone
I also managed to calibrate the PJ with settings I picked up on projectorreviews.com and the PJ is performing brilliantly for the money!
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Old 6th July 2010, 02:15 PM
 
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Re: Vertical lines on my Optoma HD20

Also, the promptness of the Optoma service center guy in Bangalore in diagnosing the problem over the phone makes me believe that Optoma owners are in safe hands.
I am not sure about other brands but for now Optoma HD20 is value for money.


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