I plug my mp3 player into the usb port on my computer and it doesnt turn on to charge like it did before. i tried to turn on my mps player and it acts like there is no power. i just got this mp3 player and have only had it for 3 days. what is wrong with my mp3 player.

Some things to check for when your player does not act like its taking a charge. USB Cable Make sure that the USB cable is properly plugged in and use the original cable that came with your player. Computer in Hibernation mode Make sure the computer isn't entering hibernation or sleep mode while the device is connected. The computer must be ON in order to charge your player. USB Port 2.0 Make sure the player is connected to a USB 2.0 port (1.1 occasionally causes charging problems). USB Port location Try plugging into different USB ports (i.e. USB port in the back of the computer); occasionally the front USB ports have limited power to charge up the device. Battery Make sure the battery is fully charged. It takes approximately 3 hours to fully charge the battery. Latest firmware Depending on what player you have, make sure it's up to date with the latest firmware. AC charger (optional) AC chargers (sold separately) have a 500-1000 milliamp max output, which provides much better charging ability than a USB port.

You can try and reset the player. resetting a Clip player: 1. Slide and hold the Power switch up for approximately 20 seconds. 2. Release the Power switch. 3. To turn the player on, slide the Power switch up then release instantly.
Some things to check for when your player does not act like its taking a charge.
USB Cable Make sure that the USB cable is properly plugged in and use the original cable that came with your player.
Computer in Hibernation mode Make sure the computer isn't entering hibernation or sleep mode while the device is connected. The computer must be ON in order to charge your player.
USB Port 2.0 Make sure the player is connected to a USB 2.0 port (1.1 occasionally causes charging problems).
USB Port location Try plugging into different USB ports (i.e. USB port in the back of the computer); occasionally the front USB ports have limited power to charge up the device.
Battery Make sure the battery is fully charged. It takes approximately 3 hours to fully charge the battery.
Latest firmware Depending on what Sansa player you have, make sure it's up to date with the latest firmware.
AC charger (optional) AC chargers (sold separately) have a 500-1000 milliamp max output, which provides much better charging ability than a USB port.
I have some tips posted here on MP3 players and their problems. Connection problems MP3 player not found by computer
SanDisk Mp3 Player Frozen

using computer's usb port, most of batteries dont charge after last level of the indicator. u need to charge using power adapter.

If it's a standard cable, it's a USB to mini USB cable. Have you tried a different cable with similar ends? Also, have you tried a different USB port on your computer?

The player needs to be charged via the USB connnection on your PC. If it doesnt fit, try the USB ports on the back. If its not working/not charging, please test the MP3 player on another PC.

When I plug my mp3 player into the Usb port, the screen goes to the connected screen for a split second. Then it goes back to the normal screen. The mps player will continue to go back and forth betwwen the two not really connected or playing untill I unplug the cord then its normal.

hay take it back to shop aned get a new one

This can be a problem with your USB capabilities in your computer.

If you are using your front USB ports, it is possible they are underpowered. Try switching to the rear USB ports.

You can also try a self-powered USB Hub to improve performance or purchase a USB 2.0 card for your system.

It could be something as simple as a bad USB cable. That would be the cheapest place to start...next to trying the rear USB ports.

wiggle your usb cord - I had to wiggle mine a bit where it plugs into the usb port in the computer before it was recognized and listed as a device in 'my computer'. only then did it actually start charging; if your computer is not recognizing it is plugged in, it may not charge.. when i finally figured this out, the actual charging of my 4 gig audiophase mps only took 10 minutes- previously i was trying to charge it for hours without any luck.

Uninstall and reinstall the version of the software from the Philips website