Super Micro Computer stock crashed as much as 23% on Friday as investors worry about the strength of its upcoming earnings report.Super Micro Computer announced it would release its third-quarter earnings results on April 30, but it didn't preannounce earnings as it did for its second-quarter earnings results in January.Companies often preannounce earnings when the results are significantly above Wall Street consensus estimates.That lack of an earnings preannouncement from Super Micro Computer...