Sansa clip will only turn on when plugged into computer, but when i take it out it goes off immediately, its fully charged and the memory is no where near full and ive already tried resetting...doesnt work either

Hi it very much sounds like the on board batttery is not charged up, (not charging) hence when you plug into the PC it gets it supply from the USB 5Volts and plays as normal

I had the same problem this morning, albeit with my 8G Clip. Nothing worked -- the thing seemed dead as roadkill -- until I found a link about "forcing MSC mode." Basically, it told me to hold down the center button while plugging my Clip into my computer using my USB cable. Suddenly, boom! It's awake and alive and happy again. I'm unsure how that works, but that did it for me.

I have a suggestion, you can try holding the power slide up for a longer period of time, or you can try and plug it back into the computer, leave it there over night, and if possible put something new on it. That way it will try and refresh its data bank and it should be on after that, and you can go into the power settings, or USB setting and chage anything you may need to. You may have accidentaly changed somthing in the program. Also if you deleted any of the folders that are originally in the player you can casue it to malfunction

Have you tried any fo the usb mp3 chargers. Check you local discount or department store. You can buy ones that plug into your car or ones that plug into the wall. They have a power supply that connects to a USB connector so you can plug your MP3 player in.

If you have a phone charger with the same connector, plug in you Clip and leave it overnight. This will fully charge the battery. There is not enough power from the USB port.

This is direct from the sansa FAQs at http://www.sansa.com/support/sansa_clip/faqs 02. Why won’t my Sansa Clip charge when I connect it to my computer? USB Cable
Make sure that the USB cable is properly plugged in and use the original cable.

Computer in Hibernation mode
Make sure that the computer isn’t entering hibernate 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 your player is connected USB 2.0 port (1.1 occasionally causes charging problems).

USB Port location
Try plugging in different USB port (i.e. USB port in the back of the computer); sometimes the front USB ports have problem charging up the device.

Battery
Make sure the battery is fully charged. It takes approximately 3 hours to fully charge the battery.

Latest firmware
Make sure to update firmware by downloading and installing the Sansa Firmware Updater.

I hope this helps, and don't forget to rate the answer.

Hi,
Check for the following:

USB Cable 
Make sure that the USB cable is properly plugged in and use the original cable. 

Computer in Hibernation mode 
Make sure the computer isn’t entering hibernate 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 USB 2.0 port (1.1 occasionally causes charging problems). 

USB Port location 
Try plugging in different USB port (i.e. USB port in the back of the computer); sometimes the front USB ports have problem charging up the device. 

Battery 
Make sure the battery is fully charged.  It takes approximately 3 hours to fully charge the battery. 

Latest firmware 
Make sure to update firmware by downloading and installing the Sansa Firmware Updater. 

charge it until the battery marker on the screen is full you should get up to 20 hrs. of battery life.

Locking the player will not allow the player to charge properly, no matter how long you have it plugged in.

If you leave your Sansa plugged into your charging source (wall charger, computer, car etc.), your player might still remain fully charged and just on. If you can, you may want to just leave it plugged into your charging source until you want to use it, so it stays fully charged.When its done, it will say fully charge...it should take a couple hours to charge the device....

Also, does your player have an auto power off or idle sleep setting? You can use this setting to set the amount of time you want your Sansa to automatically turn off after you don't use or listen to music on it.