People often ask me if they can have a controller repaired and almost without exception the answer is no – if they are faulty then they are a throwaway.
Its not that its impossible, but once you have paid for a call out to remove the controller ($75+ GST) and paid a technician to fault find (around $150) and then paid for it to be reinstalled ($75+GST) you’re up to $300.00 and there is no warranty. With a new controller around $385 it just doesn’t make sense. (Sadly because I’d rather recycle than create more junk.)
Recently someone asked about repairs to a Hunter X Core and then did their own tear down to see if they could solve the ‘sticky switch’ problem.
This is the Youtube video they made of their experience. It shows that if you can buy a switch from Hunter then the process is possible, but having disassembled a box myself previously out of curiosity I can tell you it is fiddly and easy to damage stuff.