I want to learn , how can i get in the service menü. In the nwz-a80* its like that: 1. Turn the power on. 2. Press the [bACK] key for 1.5 seconds or more, the home menu is displayed. 3. Slide the [HOLD] key to set the hold on. 4. While pressing the [OPTION] key, press the key as following order. up - right - down - left - up - play - up - left - down - right - up - play 5. The set reboots when the [HOLD] key is slided to set the hold off, and the color bar is displayed in the lcd. 6. Enter the test mode when the [bACK] key is pressed in the state of step 5. But i could not find for nwz-a81*.
