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HP Recommended

HP Z420 shutdown after startup.

 

The hdd lights up green. Powerbutton is not working.

 

No matter how long I hold the power button (20seconds), the computer will not turn on, only the green HDD LED will glow continuously green.

When I pull the power cord, the HDD LED will stop glowing after 10 seconds.

When I reconnect the power cord, the computer will automatically turn on and after 2-3 seconds the computer turn off. The green LED lights up again.

No beeping.

Battery removed from the motherboard, graphics card & ram removed, did not help unfortunately.

 

Does anyone have an idea what it could be?

 

Thanks!

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