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Author Topic: Black screen on projection  (Read 3595 times)

Ben Lawrence

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Black screen on projection
« on: February 27, 2009, 04:14:06 pm »

Hi everyone. I have a gig coming up and am looking for a way to have my projector display a black signal until the program material is ready to play off a dvd. Problem is I am not in line of sight in order to take the projector off standby and without signal the screen goes to blue. There is a freeze function but when its on it displays the word freeze on the screen. I am looking for a quick fix to produce a black signal until I am ready to run my dvd. I have a cheap a/b switch but other than that am limited on my resources at this point.

John Birchman, CTS

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Re: Black screen on projection
« Reply #1 on: February 27, 2009, 04:19:40 pm »

Depending on the projector, some of them have a setting in the menu so you can change the background from blue to black when there is no signal present.

What projector do you have?  Maybe we can help you find that if we knew what projector you are using.

John
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John Birchman, CTS
Freelance AV and Stage Technician
JRB Technical
Lake Buena Vista, FL

Ben Lawrence

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Re: Black screen on projection
« Reply #2 on: February 27, 2009, 04:23:27 pm »

Dukane imagepro 8940. It looks like there is a black screen setting but it doesnt appear to do anything.

John Birchman, CTS

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Re: Black screen on projection
« Reply #3 on: February 27, 2009, 04:38:28 pm »

Ok, with that projector it looks like the Screen Blank setting only for using the Blank feature on the remote.

Do you have the remote?  It looks like you may be able to use a stereo mini cable to connect to the projector, depending on the remote you have.

The manual is here, if you need it:

http://www.aboutprojectors.com/pdf/dukane-imagepro-8940-manu al.pdf

Hopefully this is of some help.

John
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John Birchman, CTS
Freelance AV and Stage Technician
JRB Technical
Lake Buena Vista, FL

Ben Lawrence

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Re: Black screen on projection
« Reply #4 on: February 27, 2009, 04:40:30 pm »

Thanks I was just reading the manual myself with no luck. I have a remote that does not have a 1/8 connector on it. DOH go figure. Is there any other way to rig this?

John Birchman, CTS

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Re: Black screen on projection
« Reply #5 on: February 27, 2009, 05:31:42 pm »

Only thing that comes to my mind right now; is either you find someone else to be closer to the projector with the remote that you have, or possibly try and find a IR remote extender (radio shack may still have in stores), so that you can use the remote where you are.

Otherwise, possibly burn a loop of black, and have 2 player, and a switch between them.

That's all I have right now.

Good luck!

John
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John Birchman, CTS
Freelance AV and Stage Technician
JRB Technical
Lake Buena Vista, FL

Ben Lawrence

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Re: Black screen on projection
« Reply #6 on: February 27, 2009, 05:53:02 pm »

Thank you. I was considering the black loop.

Brad Weber

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Re: Black screen on projection
« Reply #7 on: February 27, 2009, 06:54:50 pm »

I wonder if what you are seeing is the DVD screen when it is is standby.  Are you using a DVD player of a laptop?
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Brad Weber
muse Audio Video

Craig Hauber

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Re: Black screen on projection
« Reply #8 on: February 27, 2009, 11:35:44 pm »

go mechanical!

http://www.wahlberg.dk/video/shutter.htm

(It sits close enough to the lens it acts more like a fade than a wipe)

I've done it with a stagehand and a piece of cardboard too

rear project recommended Smile


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Craig Hauber
CSA Productions Inc.
Ventura-Santa Barbara CA
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waldo [Casey Williams]

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Re: Black screen on projection
« Reply #9 on: March 02, 2009, 03:25:40 am »

That shutter looks awesome! Not cheap at 225 euros, but probably worth it in saving embarrassment.

One thing I have done, is render a dvd that is black with just a subtle red spot on one corner. That way I know the projector and dvd player are live. However, the contrast ratio of my cheap projector is not so hot, so in situations where I have needed a total black, clients have noticed that there is still light hitting the screen. The shutter would solve that.
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___waldo___
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