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Hi , I`m Jack , I will be helping you today
The sharp tv`s model numbers invariably will start with the letters LC then the size of the screen ,for example for a 43" model you would have LC-43.......
Take a look again at the back for those 2 letters ?
Has to be on the back cover
Sorry but this is NOT the Sharp company and definitely not the store that sold it to you .
The numbers you gave me so far turn up gibberish only when searching them sorry
With what you gave me so far I have nothing to go on with so I will repost your question and perhaps someone here has an idea .