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HP ProBook 4720s is shutting down

HP Recommended
HP ProBook 4720s
Microsoft Windows 10 (64-bit)

Hello. My HP ProBook 4720s is shutting down while working (even without Windows, e.g., with LiveCD). Can you tell please, what voltage should be in charge? There are three contacts: ground, +19v, +15v. Is it O.K.? Thanks!

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