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Power button always glowing and can't start laptop

Probook 4740s
Microsoft Windows 10 (64-bit)

My power button is always glowing when i plug the charger or put the battery inside and pressing it doesn't do anything. I can't start my laptop. You can't hear any sounds from the vents. I tried to unplug it, remove the battery, hold the power button but nothing has helped. The power button starts glowing on its own as soon as i put the battery inside or plug the charger

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