The touch screen of the Walkman does not work.

IMPORTANT: This article applies only to specific products and/or operating systems. Check the Applicable Products and Categories section of this article before starting these steps.

Depending on what you see when you tap the screen, follow the steps listed:

When the tapped point is surrounded by a green frame:

The screen operations change as follows when the TalkBack function is On:

• Scroll: Using two fingers
• Selection: Tap once, and double tap when surrounded by a green frame

Change the TalkBack function to Off and see the issue goes away. 
You can turn the TalkBack function Off using either of the following methods: 

• Press and hold the + (volume) and － (volume) buttons for three seconds.
• Turn the function Off from the setting menu:
  1. Swipe the Home screen upwards, then select Settings.
  2. Select Accessibility — TalkBack.
  3. Turn TalkBack to Off.

When there is no green frame at the tapped point:

Update the Walkman player to the latest firmware version. After the update is completed, restart the player, then check if the issue was resolved.