Computer turns on- Apple logo appears but screen goes black / shuts off after few seconds. Computer won’t stay on
iMac 21.5″, OS X 10.11
First Reset SMC How to reset the SMC of your Mac - Apple Support
Reset NVRAM Reset NVRAM or PRAM on your Mac - Apple Support
Check if any of those options described by Apple can bring you some light If your Mac doesn't start up all the way - Apple Support
First Reset SMC How to reset the SMC of your Mac - Apple Support
Reset NVRAM Reset NVRAM or PRAM on your Mac - Apple Support
Check if any of those options described by Apple can bring you some light If your Mac doesn't start up all the way - Apple Support
My computer starts- show Apple and progress bar then screen goes black / computer off after few seconds of progress bar
