Pitty,
Thanks for posting your question to the forums. We see the linked forum post, and we agree this is information that is pertinent to your issue.
Have you tried adjusting the focusing rings on the projector? What kind of projector do you have? Please provide the product code so we know exactly which type of projector you are using. Once we have this information, we can better help guide you to resolution.
Was this projector installed by a Promethean Certified Installer, or was it installed by someone else? Please let us know by replying to this forum post, and also include a short description of your issue with the projector so that we tailor our troubleshooting to your system.
We have created case number 00388158 to support this issue if you want to call in about it. removal. If you want to do this, please contact us on the phone line listed at www.prometheanworld.com/.../technical-support-numbers.
Please let us know if you have any other questions.
Thank you,