let's get to the point. So, first my laptop screen is blank and there's a "bib" sound, so i thought it was RAM. I opened up my laptop back case and put the RAM and clean it. when i put it back, suddenly my laptop won't turn on. I tried to put the battery and plug the adapter and still....nothing happened. there's no LED on when i plug the adapter, looks like there's no electricity flowing on my motherboard.
If that mains lead isn't connecting at the wall outlet or at the power block, the battery might not have been charging and it wouldn;t be passing power to the laptop. Sometimes the obvious gets overlooked.