OK, there’s a lot of mis-information in the YouTube vid. Let’s start off on how to do the startup options. Review this Apple doc [link|https://support.apple.com/en-us/HT201255|Mac startup key combinations] as we can see the keys only work just after powering the system. Holding the power button doesn’t help here. Give them a try I don’t think it will help here.
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OK, there’s a lot of mis-information in the YouTube vid.
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Let’s start off on how to do the startup options. Review this Apple doc [link|https://support.apple.com/en-us/HT201255|Mac startup key combinations] as we can see the keys only work just after powering the system. Holding the power button doesn’t help here. Give them a try I don’t think it will help here.
The needed test is plugging in an external display to see if the systems graphics is still working. If it is the issue is your displays T-CON logic which is part of the display.
If the external display fails to work, that points to a failed CPU as the graphics is part of it. Which will require a new logic board.
OK, there’s a lot of mis-information in the YouTube vid. Let’s start uff on how to do the startup options. Review this Apple doc [https://support.apple.com/en-us/HT201255|Mac startup key combinations] as we can see the keys only work just after powering the system. Holding the power button doesn’t help here.
+
OK, there’s a lot of mis-information in the YouTube vid. Let’s start off on how to do the startup options. Review this Apple doc [link|https://support.apple.com/en-us/HT201255|Mac startup key combinations] as we can see the keys only work just after powering the system. Holding the power button doesn’t help here. Give them a try I don’t think it will help here.
The needed test is plugging in an external display to see if the systems graphics is still working. If it is the issue is your displays T-CON logic which is part of the display.
If the external display fails to work, that points to a failed CPU as the graphics is part of it. Which will require a new logic board.
OK, there’s a lot of mis-information in the YouTube vid. Let’s start uff on how to do the startup options. Review this Apple doc [https://support.apple.com/en-us/HT201255|Mac startup key combinations] as we can see the keys only work just after powering the system. Holding the power button doesn’t help here.
The needed test is plugging in an external display to see if the systems graphics is still working. If it is the issue is your displays T-CON logic which is part of the display.
If the external display fails to work, that points to a failed CPU as the graphics is part of it. Which will require a new logic board.