Sony walkman nwz-e354 screen went black, but still functions, i twist the device a bit and the screen goes back to normal until i let go. can i fix this myself?

SOURCE: Sony walkman:NWZ-S615F black

I lost my sony walkman installation cd so I can't delete my music to add new music

SOURCE: fully charge sony walkman NWZ-E436F does not turn on power at all

well u might have gone wrong u should charge ur walkman for abt 3 hrs first use untill full appears and it is recommended that even if u dont plan to use u r walkman u should atlest charge the battery once a while for battery mentainance try to reset ur update the player firmware.or even then if it dont comes send it to sony or have a converstion with sony support

SOURCE: Describe your Sony Walkman Video NWZ-S616F MP3

Hold the reset button on the back and it will rebot and should work.

SOURCE: HELP ME PLEASE with my "sony walkman NWZ-B105F MP3 PLAYER."

make sure your downloading it to the right folder on the mp3 player its usualy the music folder or you can try and use windows media player here are some instructions for that option.
--**Windows Media Player**--
If you have a large playlist to transfer, you may prefer to do it from your media player, such as Windows Media Player. Once your MP3 player is connected to the computer, open Windows Media Player. Click on the "Sync Music" tab. Drag songs that you want from your Windows Media Library over to the "Sync Music" column to create a playlist. Click the "Begin Sync" tab at the bottom once you have all of the songs on your playlist. This action will sync all of the songs to your MP3 player with one click. Disconnect your device once songs have been transferred by clicking on the "Safely Remove Hardware" icon in the bottom-right side of the desktop tray.

SOURCE: unknown walkman

Downloading and installing driver from the website wont help much on this issue. It usually happens with the faulty usb port on the MP3 player or on the machine. Try connecting to another USB port on the machine. Also please check if the USB port on the machine is working fine