I would love to know if anyone was ever able to get into "test mode" as described the service manual.
The documented procedure is to put the player on "hold", and then, while holding the "stop" button on the device, you have to use the remote to "2x forward" , "2x backward" , "forward", "back", "forward", "back" , "folder -" , "folder +".
I tried it 100s times, I cannot activate this test mode :/