If sound comes through ok then the model 20 has defective display circuits and can be sent in for repair perform the following to determine the condition of your model 20 with a blank display verify the power adaptor is a bose model ps71 if it is not then get one. At bose were dedicated to better sound and better service our goal is to provide you with exceptional service for your boser products and systems if you experience a problem with your bose product at any time were ready to help. Save bose lifestyle 20 repair to get e mail alerts and updates on your ebay feed items in search results repair bose lifestyle music system c1 cd changer flat rate. Page 1 the bose lifestyle 20 music system r r owners guide october 29 2001 am178934 09 vpdf page 2 safety information warning to reduce the risk of fire or electric shock do not expose this system to rain or moisture caution risk of electrical shock do not open caution to reduce the risk of electric shock do not remove cover or back no user serviceable parts inside. Here is a quick instruction showing how to access the board and fix the dead display
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