In worst case scenarios, the power supply will fail, and the motherboard too, If the voltage is overloaded, The motherboard will not die, unless the power supply has failed, and let too much voltage into the motherboard, try reseting the PMU(Power Management Unit) hold the power button for 10 seconds
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, it might make a tone, and flash the power light on, and off. If not, check the motherboard for a button, press it, and this will reset the PMU/PRAM. If this doesn't do it, check the connections, all of them reseat the following: RAM, Graphics Card, Power Supply Connector, Other Expansion Cards (If Present). If this doesn't fix it, the system battery might be dead, and it need replacing. Older macs would not boot if the battery is dead.
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, it might make a tone, and flash the power light on, and off. If not, check the motherboard for a button, press it, and this will reset the PMU/PRAM. If this doesn't do it, check the connections, all of them reseat the following: RAM, Graphics Card, Power Supply Connector, Other Expansion Cards (If Present). If this doesn't fix it, the system battery might be dead, and it needs replacing. Older macs would not boot if the battery is dead.
In worst case scenarios, the power supply will fail, and the motherboard too, If the voltage is overloaded, The motherboard will not die, unless the power supply has failed, and let too much voltage into the motherboard, try reseting the PMU(Power Management Unit) hold the power button for 10 seconds
, it might make a tone, and flash the power light on, and off. If not, check the motherboard for a button, press it, and this will reset the PMU/PRAM. If this doesn't do it, check the connections, all of them reseat the following: RAM, Graphics Card, Power Supply Connector, Other Expansion Cards (If Present). If this doesn't fix it, the system battery might be dead, and it need replacing. Older macs would not boot if the battery is dead.