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Hi Beau and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model number of the "...46 inch Sharp Aquos lcd..."
Appreciate the additional information.
The LED blinks would be indicative that the system has kicked in auto-protect mode due to an internal hardware issue.
Are you then considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even perhaps a soldering iron?