Hey folks - picked up a 2013 rMBP from a friend who has upgraded. Trackpad does not function at all and keyboard has lag where I doesn't register keys all the time - but repeating the keystrokes, they will register. Run the hardware test and got NDR001 and NDK001. Coconut battery shows only 380+ cycles and 85% capacity from original. I know there can be issues with battery swelling causing some issues but this battery is a low cycle for the age. So - wonder if a simple trackpad ribbon cable would fix it - or if someone else has had a similar issue? Works fine with external mouse and keyboard. Reset all the usual PRAM / SMC etc. Wondering if there's anything else I've missed? Thanks in advance for your input!