Press the AV Mode button on the remote to change source.
Manual below, pages 10 and 14
http://static.highspeedbackbone.net/pdf/Sharp_LC37SB24U_LC32SB24U_Manual.pdf
Use the input selector to change back to TV. Usually the first input on the list.
I had a same problem with sharp LC-40LE340E. The service told me to change motherboard but I decided to buy a new LG TV. The sharp TV I left unplugged for a 50 days and after that when I tried again the tv started normally. I was Really surprised. Don't spend money just wait and check again. [email protected]
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