MFR Part Number 1: Sony A-1231-579-A (A1231579A). MFR Part Number 2: Sony A-1231-579-B (A1231579B). MFR Part Number 3: Sony A-1231-579-C (A1231579C). Board Number(s): 1-870-864-13, 1-870-864-12. Horizontal lines on the screen are NEVER caused by a board.
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