Super Micro Computer said on Thursday that an independent investigation led by its board found no evidence that current members of senior management knew about an alleged scheme to smuggle $2.5 billion in hardware packed with Nvidia chips to China. The announcement was meant to clear the air for investors after a shaky five months following the U.S. Department of Justice’s March indictment of co-founder and board member Yih-Shyan “Wally” Liaw. But questions remain despite Thursday’s announcement...