I performed SMC, PRAM, NVRAM resets. When I did a SMC reset keyboard and trackpad worked temporarily. After a while keyboard and trackpad stopped working AGAIN. After the reset still doesn’t work. Opened in safe mode. Installed windows, I tried it all and it didn’t work. My question is simple. If the cable really is broken then why did it work when I did a SMC reset? Another question is- When I was installing windows on my computer for 2-5 seconds the trackpad worked. Then it stopped again. Why did my trackpad work on windows temporarily if the cable really is broken? Another question- Why is the computer working fine on ubuntu linux 20.10 if the cable really is broken? That’s all thank you. (Trying to fix my old mac in quarantine)