It makes sense (from a customer focus and engineering perspective) to design items to be easily maintained&#x2F;repaired.  HDTV projection TVs primarily have lamp units that can be easily replaced by end users.  My project HDTV was built in 2005 and doesn&#x27;t have such an easy setup <a href="http:&#x2F;&#x2F;gadgets.curiouscatnetwork.com&#x2F;2015&#x2F;09&#x2F;08&#x2F;homeworx-hdtv-digital-converter-receiver-with-media-player&#x2F;" rel="nofollow">http:&#x2F;&#x2F;gadgets.curiouscatnetwork.com&#x2F;2015&#x2F;09&#x2F;08&#x2F;homeworx-hdt...</a><p>From looking around trying to find what bulbs I am suppose to use I found that pretty much all manufactures seemed to use a simple lamp unit replacement.  They all decided it was silly to have such an item not easily replaceable - sadly not mine (mine may well have been the first year of projection HDTVs by Toshiba maybe they took short cuts to get it ready early).<p>Engineering for sensible repairs is something consumers should expect.  Where you draw they line is sometimes hard but some things seem obvious.  And that may change over time, not having easy user replaceable batteries seems silly to me.  As Apple designed every smaller items and batteries didn&#x27;t need to be replaced so often making them non-easily-user replaceable became more acceptable in my opinion.<p>Still it would be better to design for easy and cheap maintenance if possible.  Far too often it seems like products are engineered without any thought to servicing or with thinking that seems like planned obsolesces (making it intentionally hard to maintain).  Though my guess is it is usually just not thinking about how to design it well for the actual customer use, not them intentionally designing it so users have to buy new ones due to specific design features and company policies shortening the useful life to customers.