Repair of Oppo

Mornings Gents

I bought a Oppo BD 83 Modwright some years ago. Not using it, bacause it has a peculiar problem:

It would play normally, then all of a sudden there will be a blue screen and a loud white noise. This will last several seconds, before it returns to playing normally.

Any suggestions as to whom to take it to in the Pretoria/ Jhb areas?

Much appreciated

Danie