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Re: new Benq MP611P installed - no user manual
You have a problem in the alignment of lens. you should see service man to fix the problem. if you think it's not the lens is the problem. try to go the menu option that you can see and adjust the contrast ratio or the color and brightness adjustment that might help you.
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when you say its cutting off the image, do you mean it is blanking the top and bottom off the picture. Is the image that is displayed on the computer the same as on the projector or is it just a cinemascope version of the computer screen
Swap the two MP771s over and see if the fault lies with the projector or not. If the problem image swaps over then your two projectors are behaving differently. Perhaps a factory reset might help.
I'd say that it is more likely that the problem lies with your graphics card settings rather than the projector. Projectors, in general, have a native resolution. Most of them will accept non-native resolutions and interpret them to fit, but the actual resolution of the projector can't change. Triple Heads to Go are quite tricky to setup. You should check the TH2G manual and see that the screen resolution which you are attempting to use is supported, the analog versions are quite particular.
Adjust your graphics card settings and see if that helps (This is where you will find the solution!). You need to compare possible settings with those of the TH2G and the projectors (The projectors get 1/3 if the TH2G accepts and splits the signal properly). You should be able to view the actual projector input settings to see how they compare to what you expect.
Start at the lowest 12x3 screen resolution that the TH2G will accept and see if that helps. Make sure refresh rates are set to match too.
It can be a fiddly process, however once you find the correct settings then it should all work great for you.
It appears from researching that the native res for the Benq is too low 800x600 so I will never get a good picture even though most of the images I install are at least 10meg originals. Also the new projector will work in a bright room the Benq will not.
It definitively sounds like either a Screen resolution or a Screen Refresh rate problem. I would suggest you start at the bottom: set your Screen Resolution to something very low like 800x600 and set the Refresh rate to 60Hz - both in Windows of course - you'll probably have to do this with you regular display attached to you PC first, then connect your BenQ second. Than move your way up to the recommended spec in your BenQ User manual.
I had a similar problem with my Benq 8700+. The aspect ratio would show in the R low corner on changinbg resolutions, and would close down to a single line ("anamorphic" for example) which would remain on the screen. I checked the manual (useless) and went through all the set up screens (again useless). In despiration, I decided to try to unplug the projector and did so for 30 seconds to allow the charge to drain from the circuits powering the chips in the 8700+. Upon returning power and restarting, the screen resolution appears/disappears properly once again. Give thjis a try.