Laptop not turning on & I saw before install repair

Goo day, my laptop refuse to keep charge, get charge or even turn on. When I press the turn on button, I have to hold it down for long and still nothing happens. When I assume battery is dead so I charge it, no light or power comes on. It eventually turned on back 1 day and before I knew it,it shut down by itself even though it had battery life and has not turned on back since. Once I saw installing repair then it shut off. How do I go about using back my laptop?

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Was is running in a healthy state, is there any issue like liquid split or water damage or any other such thing.

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No it never got any spill or drop either.

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