In the optoma hd-81 there is a lamp unit housing.It goes faulty the lamp unit housing .There is no ballast in the hd-81 projector.There is lens ,the lamp unit housing and the circuit board.In most of the cases the lamp unit housing goes faulty.In that case the lamp housing needs to be replaced.It can be replaced and replacement lamp is also available.
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Buying original lamp is always advisable.But there is compatible lamp also available.The original lamp housing is costly and compatible housing is bit cheaper.In some rare cases the compatible lamp does not work.But the compatible lamps also are good.
To buy original lamp.Click this link directly:---
http://www.partstore.com/Part/Optoma+Technology+Inc/Optoma/HD81/Optoma+Technology+Inc/Optoma/BLFS300B/New.aspx
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this is link for compatible cheaper lamp.Click this link:--
http://www.partstore.com/Part/Optoma+Technology+Inc/Optoma/HD81/DNGO/DNGO/BLFS300BRL/New.aspx
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The procedure to replace the lamp:--- to get this procedure.Please click on the link below:---
http://www.partstore.com/Part/Optoma+Technology+Inc/Optoma/HD81/DNGO/DNGO/BLFS300BRL/New.aspx
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this link is for the user manual of optoma hd-81 and the procedure to replace lamp is mentioned on page number 59.Please read the instructions before replacing lamp.----------- This will help.Thanks.Helpmech.
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