On start up with my 2009 imac with Yosemite I only get a black screen. I can't do anything. I have tried holding down the option button on start up. But there is only a black screen still. I have also tried holding down the option and command and P and R keys but I still just get a black screen. I have also tried holding down the D key on start up but still nothing happens so I can't run a hardware test. I don't know what to do. Can you help me?
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Black screen
- Thread starter Kouta
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