Mine is doing the same but I can power up if I remove battery and power cord, holding power button for 60 sec (power reset) it will power up after inserting the back power plug and or battery. Did you try to reset bios by removing inner CMOS battery or replacithe ng battery itself? I am thinking to do that.
mine have worked twice. its from the system software that dynabook have, eco battery saving mode, this system software can control the hardware that it control the battery even if the pc is shutdown. that you cant go more that 80 present.
My fan is making weird noises and I'm trying to clean it but when I tried to take off the bottem, there's something holding it at the top left corner near the fan which I tried to detach. The VGA port touched the frame of the laptop and made an ark, I hope the laptop is still okay. I still have the hard drive and ram installed with the covers as well, do you have to remove them first? Edit: I got the hard drive and ram out, thanks for showing how to open the cover in the video
congrats; always, when you dissansemble a notebook, don't force anything and try all ways, even they are almost impossible to be build in that manner; manufacturers do a lot of ways to make an notebook.