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-   -   BENQ W7000 Lamp intermittently loses brightness (https://www.avsforum.com/forum/68-digital-projectors-under-3-000-usd-msrp/1519224-benq-w7000-lamp-intermittently-loses-brightness.html)

alxpowa 02-22-2014 07:46 AM

Hi everyone!

 

I bought this projector new a little over 1 year ago, my lamp time shows about 900 hours.

 

I am experiencing a loss of about 90% of brightness intermittently. It SEEMS to be happening more often when there's a lot of white flashing (concert for example).

 

I already ordered a new lamp today, but is there another possibility? 900 some hours is kinda low isn't it? I don't see any error lights turning on and I have tried turning ECO mode ON, no result.

 

I am not much more familiar with the troubleshooting procedure of a projector, so if any tips could be given, I would appreciate.

 

Ah, and I removed the bulb compartment to see if there was any dust or anything, but no. There is a lot of heat coming out of the air vents, but I guess it is to be expected with that much power.

 

Thank you for your help!

 

Alex


42Plasmaman 02-22-2014 04:31 PM

Can you turn the iris off?
If yes, see if that corrects it to determine if it's the bulb or iris clamping too much.

alxpowa 02-22-2014 06:41 PM

I cannot find that option.

 

I watched some shows for about 2h without a problem, but then it started.

 

If it can help, I cannot control the brightness at all when it "'shuts" down. I barely see the image even if I crank the brightness slider to the max.

 

So it seems it loses control over the brightness for a while. When it comes back, I can change it again at will...


42Plasmaman 02-24-2014 06:58 AM

Quote:
Originally Posted by alxpowa View Post

I cannot find that option.
Page 38
Turn off Dynamic black in the Advanced picture settings.

http://www.projectorcentral.com/pdf/projector_manual_6743.pdf

alxpowa 02-24-2014 01:55 PM

Quote:
Originally Posted by 42Plasmaman View Post


Page 38
Turn off Dynamic black in the Advanced picture settings.

http://www.projectorcentral.com/pdf/projector_manual_6743.pdf

Ah okay! As soon as I experience this again, I will try that!

 

Thank you again, as I said, I am a neophyte in the world of projection. It would disappoint me tough that it breaks after not even 1000 hours of use...


AudioBear 02-22-2015 06:22 PM

OK, looks like i have the same problem. Did turning off dynamic black help?

I have less than 400hrs.....

Please suggest other possibilities besides the dynamic black and IRIS control.

Thanks

AudioBear 02-23-2015 10:38 AM

I'll answer my own question. Turning off Dynamic Black seems to have stopped the problem for the moment.

splode 02-23-2015 01:44 PM

If you go to the main w7000 thread you will see that was a known issue. My particular experience was that the iris only clamped down during gaming. I turned the iris off during gaming and turned it back on for movies. Never had a problem with movies.

In that same thread are instruction for going into the service menu to reset the iris. My iris clamped down so tight it was a totally black screen. After resetting it would be fine for a while and then the same thing would happen if I was gaming. It seems some people just turned the iris off and manually adjusted to their preference in the service menu to avoid the problem (or just left it off). Myself, since it only happened during gaming, I turn it back on for movies.


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