TIME WAS,SONY CORP.was an unbeatable force in televisions.Its Trinitron TVs ruled the business for decades,with consumers worldwide willing to fork over a premium for Sony's quality guarantee.That makes the company's July 28 revision of its profit forecast even harder for its execs to stomach.Sony said it expects to earn just US270 million this fiscal year,down from an earlier forecast of US1.4 billion.The primary culprit for Sony's woes,it turns out,is its TV business.
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