My sony walkman, i believe it's a nwz-s545 is acting odly. it functions fine, but the screen is very hard to read (it's like displaying in high contrast or something like it) and is mostly whited out making the text nearly impossible to read. It's not even a year old yet and i've only used it twice. please help me fix this screen issue.

SOURCE: Media Manager for Walkman 1.2 does not recognize Sony NWZ-S615F

look up here: http://www.sony.com.my/support/faq/1169186/product/nwz-e435f/print

SOURCE: My Sony Walkman NWZ-E435F wont turn on at all even when plugged in with my USB

I had the same problem. For at least a week. Try pressing the reset button. The reset button won't delete your music, videos, pictures, etc. Just resets your system. If that does not work then i don't know what else to tell you.

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: Sony 16g Walkman NWZ-S545,but system will not recongize it !

If you have XP SP3 installed , you might face this problem.
Go to the Device manage. Click on the update driver of the sony walkman device driver. When the dialog box appears select, choose install from a specific location, then click next.Then in the next part of the wizard, select don't search, i will choose the driver to install and click next. then choose from the portable driver, select USB root hub. Click next and finish. You are done and enjoy the data transfer and music.

SOURCE: my sony nwz b133f is detected as mtp player but

up date your driver.you can do it from the companies website