I had to replace two parts on my laptop (the bottom and top chassis, nothing internal) so I followed a guide and took it apart. It pretty much involved taking everything apart. After assembling it again I put in the battery and tested it out. It booted up and I got to the log in screen but it suddenly just powered off. I took it all apart again and tested my connections. I am trying to make it work right now with everything disassembled. I have checked all ribbons and it all seems to be in order. Sometimes the HDD starts but then it shuts down after around a minute. Sometimes the fan will start on full blast and just keep going. I get variations based on if I fill 1 RAM slot or 2. The screen does not turn on at all now. I have made sure to double check all connections. Does anyone have an idea of what the issue might be? Thank you