AMD 13 having battery and BIOS issues

Hi, so, I managed to put together the DIY version of the laptop yesterday, but I’ve been having issues mainly with actually booting up an operating system from a USB. About an hour ago I came across a solution involving turning off secure boot, but as I went to implement this change, the power button started flashing and the laptop turned itself off. I managed to load the BIOS settings again by turning the laptop on but it only stayed on for 20 seconds or so. I tried charging it too, something it was previously capable of, but it’s not charging at all, no LED indication or anything.