I recently bought an older Toshiba (windows 7 around 2010 I'm pretty sure). I knew that it was broken when I bought it but I'm trying to dive into understanding and fixing computer hardware. The issue it is having is that its not powering up. The screen is black and but both the battery and ac adapter are fine (both have lights that work and come on.) That being said when I hit the power button the power indicator comes on for probably less then a second and then all 3 of the lights (battery, ac, and turned on light) turn off instantly. In order to get the battery and ac light back on I have to unplug the ac and replug it in. The computer makes zero noises (such as fan) nor does it give any indication that it is starting up at all. The guy I bought it from thought it was a screen issue but I don't think thats the case for the reasons stated above. So I'm hoping someone with more experience in hardware can help me with diagnoses and what part is malfunctioning? Thanks in advance for the help!