We are a conference facility with a large projection screen we have recently bought a Vivitek projector and we are having problems making the picture small enouhg to fit on our Theatre screen the further away you take the projector the bigger the picture gets

Please check the fan

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VIVITEK D511 Projector Lamp

The DLP Chip is failing .The DLP or Digital Light Projection Chip contains up to 8 million tiny microscopic mirrors that tilt to project a digital image onto the screen. These mirrors are failing causing light and dark spots to appear.Unfortunately fixing this projector is probably going to cost more than buying a new one. Hope this helps.

Hello
Check the Projection setting on the Installation I menu of the OSD

Hello!
Bad news: the problem is the light engine! most expensive part of the projector. Due to high temperature inside and extended usage with poor ventilation, plastic filters inside the light engine start melting and picture gets "spotty". Next, the color matrix quits and one of primary colors is missing. In any case, light engine is "goner". It's very big job to replace it. I would surrender to repair facility in your place. Or, if you can get replacement projector for a good price, just do that. Your projectors repair bill might be $500+,or more. due to high cost of light engine.
Good luck,
thanks,
Alex.

Hello, firstly I would try a new VGA cable first and then wiggle the VGA cable in the ports, sometimes the ports become damaged when strain is put on them (more likely to be the laptop VGA port) If this doesn't correct the problem then it is likely to be a polarizing lens in the projector. If so it may be too costly to repair as projectors can be bought for just over £200.

Good luck

if it is from cd player the you just need audio video cable to connect,just connect it between two device and let your d510 find source auto good luck

If you enter the menu, it is useful as the projector can be used for rear projection, as it is set now.

turn the tv ON: On the side of the TV press the menu and volume up buttons at the same time for three seconds. The 'reset lamp timer?' will appear on the screen. Press the OK button to accept. You're done!

when you replace the door, after you have reinstalled the lamp, make sure that the button inside the television cabinet is being pushed in by the door. i had the same problem when i first replaced my bulb.