I am trying to find these washers that go under the lightning connector as to where I can find an extra one of these for a repair and also need some help figuring out after replacing power cable, LCD and screen, lightning connector and both flex cables on the motherboard, the back case and the battery why the iPhone 5 is not charging or powering on... If you can help me figure out this issue I would greatly appreciate it.

Could one missing washer cause this to be the issue.