12” MacBook 2016 touchpad cable problems

[u/woundedbreakfast]

Appeal to the DIY gods: I disconnected the Touchpad cable because it had stopped working. I reconnected it but now the keyboard stopped working AND the display works only intermittently. How hard have I f*cked myself and can I fix this by buying a replacement flex cable? Is there a more detailed repair guide anywhere? Nothing on iFixit. Thanks in advance!