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Z420 Power Light blinking 4 times when off

HP Recommended
Microsoft Windows 10 (64-bit)

Hello, I have an HP Z420 that has recently started doing something weird. When I turn it off, instead of going dark like it normally does, the blue power button will blink, 4 at a time, non stop. The light is still blue, and the computer still operates as normal when on. Does anyone have a guide that shows what the blinking light means, or know why it might be doing this? I am not setting it to hibernate, I am fully shutting it down as I allways have. 

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