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Hi,

My Laptop Model- HP ProBook 450 G4

I was using my laptop in that time suddenly my laptop got power failure. Ac adapter and battery was plugged in.

Then I try to power it on again but now my laptop Power Led, Wifi button Led, Sound Mute button Led are turning on and off and fan is also turning on and off.

I have tried to change ram and ram slot, removing hdd and sdd, but still remain same.

Please give me some advice. What I can try next?

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