1. Check / clean joystick
2. Check / clean ui module connector
3. Compare / replace ui module with a good one if needed or just make a jumper wire
4. If the problem not solved check and replace ic asip emif
5. Position asip emif near ui module connector (Asip emif is interface between ui module and Upp.)
7. If the problem not solved, replace Upp
8. If the problem not solved, maybe circuit (PCB) broken...
