Help, black screen problem on HP 348 G4

[Cyclon3]

So my parents bought a used laptop for my brother from a nearby repair shop 2-3 years ago and i used it for like minecraft and yt etc, around 6-7 months ago the black screen issue started appearing like the fan turns on for 2 sec and turn back off i watched a yt tutorial he said to remove the battery and connect it back, it worked for few months but then issue grew and it started taking too much time to turn on by chance like i had to keep trying for 5 hrs sometimes 12 hrs. I took the laptop back to repair shop and he told us that battery is damaged without even looking at the laptop he cleaned it and gave it back. When the issue was unbearable i took it to multiple local shops they said the bios is probably causing issue but one shop at a famous laptop repair place took the laptop from us for 5 hrs and then opened every single part of it tossing it around and then gave it back saying they couldn't fix it. Before giving it to them the laptop turned on for like one time and the cmos reset error was on screen since then laptop hasn't turned on.. it still has power the fan still runs for 2 sec but no screen.

This is the only laptop i have for now and i don't want my parents to buy a new one rn because of financial reasons. 

Please help and sorry for writing this big ahh story.

Also i installed windows 11 on this laptop years ago (yeah im such a dumbas)

Laptop:- HP 348 G4

[Cyclon3]

yoo hp community i need this

My laptop is kinda screen less