Projectors
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    • #18815
      Brian CaugheyBrian Caughey
      Participant

      Model No PRM-10  Chasis No KJ7-1000  Serial No 68509069

      No light so new lamp fitted, no change in power up sequence as follows,

      From power indicator steady red turns to steady green for 50 seconds after pressing power on from remote control then starts steady blink for 45 times and then returns back to steady red. During this sequence the fan noise varies up and down.

      Lamp cover screw has been checked as being tight  and cover nicely seated.

      As a test the cover was removed and I expected the indicator to flash 7 times (from reading through other posts here), instead the exact same sequence as above took place ie. didn’t matter if the lamp cover was on or off.

      NB The lamp was replaced only because of light loss and not because of any lamp life warning.

      This is the only one of this type (PRM-10) in the school so have to believe the new bulb is working.

      Is there any test for a faulty bulb?

      Any help would be appreciated,

      GrandadBrian

    • #18819

      Hi Brian,

      Thanks for your post.

      It’s possible that the new lamp may be faulty, if you place the old lamp back in (even though this may not be as bright), does this still work to display an image?

      If so, then this may be the result in a faulty lamp.

      Kind regards,

      Adam

      Promethean Support

    • #18821
      Brian CaugheyBrian Caughey
      Participant

      Hi Adam,

      Thank you for prompt reply.

      New bulb was fitted originally because there was no light whatsoever (sorry my choice of words in original post ‘light loss’ sounds the bulb went dim), it was swapped back when new bulb did not cure problem. Both bulbs have same fault……..bulb completely dead.

      Is it commom for new bulbs to be faulty? The actual bulb in new assembly is Philips UHP 200/150W. Is there any way to verify if our new bulb is faulty other than having another OHP of same model?

      Had a closer look at faulty bulb seems like it exploded as reflector is cracked, front lens all clouded and a wire I noticed wrapped around the new bulb glass has gone/disappeared from original lamp.

      Just tried projector without any lamp fitted and get the same sequence of attempting to power up.

      Regards,

      Brian

       

    • #18824

      Hi Brian,

      Thanks for your reply.

      It definitely sounds like the original bulb had an issue. However it’s possible that there is an issue with the replacement lamp you have purchased. Although usually a new replacement lamp would not have the same issues unless there is a further issue with the projector itself.

      The next steps would be to look at either testing another lamp, or having the projector serviced.

      Kind regards,
      Adam

      Promethean Support

       

       

    • #18834
      Brian CaugheyBrian Caughey
      Participant

      Thank You Adam will have to try another bulb though at the cost of a new one I will have to find some way of testing replacement bulb.

      Regards

      Brian

    • #18871
      Brian CaugheyBrian Caughey
      Participant

      Hi Adam,

      Installed a known good bulb from another working projector and still get the same sequence of tryig to power up, so still no light output.

      Any ideas?

      Best Regards

      Brian.

      PS How do I open a new ‘post’?

    • #18872

      Hi Brian,

      Thanks for posting.

      This would indicate an issue internally to the projector and would need a repair in order to help resolve this.

      To start a new post, at the top of the window, you’ll see “ask a question”, then be presented with the different categories to post in to.

      Kind regards,
      Adam

      Promethean Support

    • #18873
      Brian CaugheyBrian Caughey
      Participant

      Thank you Adam.

      Best Regards,

      Brian

    • #18903
      Brian CaugheyBrian Caughey
      Participant

      Hi Adam,

      Finally got bulb verified as being good so went deeper into fault. Stripped projector down to expose the thermal switch which seemed to click into position when pressed with a screwdriver. Next was the tangential fan which cools the bulb it was completly bunged up with hard packed dust, cleaned this out and reassembled ……. O joy! after switching on the lamp worked.

      Projector now back in Reception class of local primary school.

      Thank You for help,

      Brian.

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