Why is laptop not turning on. I have replaced the battery and the plug

I have an Acer aspire es1-512. It stopped Turning on so I had a tech. He said to replace battery and the plug-in in the back of laptop. I had both replaced but the laptop still will not power on. No lights are on.

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Have you tried these possible solutions yet?

laptop has no signs of power

This YouTube video gives some ideas:

https://www.youtube.com/watch?v=PdgE0bed...

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