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hp zbook 15 g3 won't turn on - power button light blinking continously when plugged in

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I have an HP zbook 15 G3 that won't turn on. When I plug it in the power button light blinks continuously. Pressing the power button does nothing. No other lights are on. I am using the power cord that came with the laptop.


I have attempted to reset the laptop by unplugging the power cord, holding down the power button for 15 seconds, plugging the laptop back in, and pressing the power button. No change.


I have left the the laptop plugged in for an hour, then pressed the power button. No change.


I have also purchased a replacement power cord. No change 😞


Anyone have any suggestions?

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