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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, did the Sony KDL-48R510C came with an external AC/DC adapter/block?
This model uses an external AC/DC adapter/block. Its 19.5V output plug is plugged into the DC IN socket at the rear near the bottom right of the TV with the rear facing you. The DC IN socket is left of the COMPONENT INput jacks particularly the R-AUDIO RCA jack.
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