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    • #32322
      Luk GoffinLuk Goffin


      In my school we purchased 5 refurbished combo’s beamer UST-P1/Activboard300 from Promethean.
      All 5 of them deliver a very poor image at the 4  sides & corners , in the center the image is rather good.
      I already cleaned the lense and mirror, but without good result !
      Is this a short throw beamer , not an ultra short throw ?
      Could this problem be caused by bad lamps ? My supplier said they have been less than 3000 hrs used !

      We also have several ultra-short throw EST-P1 which deliver a perfect image !
      We are very fond of the possibilities of the EST-P1 promethean installation !

      Please advice us how we can resolve this problem.
      Many thanks in advance and kind regards from Luk (Belgium)

    • #32336

      Hello Luk,

      Thank you for your post.

      We have opened a new support case in our system to log this issue as we will require the serial numbers of the affected units as well as photos of the grid test, lens and mirror. We have sent you an email to request this and have included some additional troubleshooting steps for you to carry out.

      We look forward to hearing from you.

      Kind regards,


      Promethean Technical Support

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