Ryan writes that an Apple retail store’s Genius declared his MacBook Pro dead: the required logic board replacement would have cost more than a new computer. So Ryan moved on, and sold his old MacBook for parts. Only it turned out that the Genius misdiagnosed Ryan’s computer. The logic board was fine, and the real cause of his computer’s failure was an inexpensive-to-replace bad stick of RAM. Ryan dropped two grand on a new computer for no reason.