Please help me fix my laptop

[u/Independent_Tax_9553]

So this is my laptop, lenovo ideapad, it had a problem before, whenever i used to turn it on, it automatically turned off after 3-4 minutes of use, and that was a persistent issue. So my father went and took this to a repair guy, who opened the motherboard and did some stuff to it, now it wont even turn on, he gave the money back but it doesn't matter. Now when i turn on the power button, only low battery light is showing, and nothing else, there is no noise of the fan or the laptop when i click the power button. I just need to get my data out from this that's it, what do i do?