My laptop won't turn on, when I press the power button it start for 8 or 10 seconds but then shut down itself, I did the soft reset but also it did not work, and I checked the ram and there's no problem with it,then I thought maybe the bios is dead,so I reinstalled it through another laptop to my motherboard but it's again still not working, anyone can help about that!!!
Try removing the battery completely then see if it runs on mains power alone. Sometimes a battery can be so weak it can't even pass power through itself. Sometimes, that's because it spent a lot of its life doing only that and never got to work on its own.