My bad I just realised that you are Cape Town based. The service center is in JHB. It’s still worth shipping up for excellent service with Yamaha Accredited Technicians in my opinion. All the best.
Take it to the Yamaha Service Center. The are located near the Woodmead area. Their showroom is visible from the M1 highway. The service/repair center is behind the showroom. Mine also did the same & it costed R565 incl. vat to repair. It was a damaged diode. I would go that route so that you...