Ok, I'd suggest that you do a soft reset of your player. You will find the reset button next to the 'power on' button on the side of the player. Please hold the Reset button using a pen tip or other sharp object for 10 seconds. Now turn it on. Please make sure that the player is fully charged before performing these functions.
You can also format the player. Contents may be removed by using this function. So make sure to back up your contents. Here is how to do this:
Connect your GoGear player to your PC. On your computer desktop, double-click "My computer". Double-click on the MP3 player's icon. Right-click on the Internal Storage icon and then select "Format". Disconnect it once the format is complete.
If that doesn't work, you can repair the player. To repair it you must have the Philips songbird installed on your computer. You can download it from this link:
Please follow these steps to repair your GoGear MP3 player using Philips Songbird:
Launch Songbird and then connect your player to your computer. Select "Repair my Philips GoGear" under the "Tools" menu. Follow the instructions given by the pop-up windows to perform the repair process.
*Contents may be removed by using repair and format functions. So make sure to back up your contents.
Hope this helps. If the problem still persists you can contact Philips support team at www.philips.com/support