On the laptop's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time. Release all keys and the power button at the same time – the little light on the MagSafe adapter may change colors briefly to indicate the '''SMC''' has '''reset'''. Boot your Mac as usual.
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SMC - On the laptop's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time. Release all keys and the power button at the same time – the little light on the MagSafe adapter may change colors briefly to indicate the '''SMC''' has '''reset'''. Boot your Mac as usual.
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'''Resetting NVRAM'''
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# Shut down your Mac.
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# Locate the following keys on the keyboard: Command (⌘), Option, P, and R.
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# Turn on your Mac.
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# Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
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# Hold these keys until the computer restarts and you hear the startup sound for a second time.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test and ask specifically for the VST (Video Systems Test)
On the laptop's keyboard, hold down the Shift+Control+Option keys and the Power button at the same time. Release all keys and the power button at the same time – the little light on the MagSafe adapter may change colors briefly to indicate the '''SMC''' has '''reset'''. Boot your Mac as usual.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test and ask specifically for the VST (Video Systems Test)
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test and ask specifically for the VST (Video Systems Test)
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Genius reservation http://www.apple.com/retail/geniusbar/
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on-line https://getsupport.apple.com/GetproductgroupList.action
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check warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do