Carlos Barrera Chaupis on Walkman NWZ-B153F:
I used to have the same problem. But the freezing can also happen when you try to turn it on. You may also eventually have problems while trying to copy files from your computer to the device. A little window appears saying the copy couldn't be accomplished because the devise just turn itself off. (?)
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Sony Walkman NWz-B153F Problem
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