SANSA C140 NOT TURN!! my sansa is updated but not works

follow the steps outlined here

problem in software SanDisk Sansa C140

Try copying new MP3 files to it. If you cannot do that, try downloading Sansa's Firmware Updater and following the video example on Sansa's website to update your firmware. If that doesn't work, try to get it replaced if it is under warranty. Otherwise, please dispose of properly.

You can try to reset the device by pressing the power button for about 15 to 20 seconds..if that doesnt work I would recommend you to go to the sandisk site to update the firmware on your device or you can contact sandisk to they can help you with updating the firmware on your device..Please follow the link below to get the firmware
http://www.sandisk.com/Retail/Default.aspx?CatID=1376

The number for sandisk is 1-866-726-3475
Please rate accordingly
Thank you
Computerrep

Keep in mind thats going to delete all the songs on the device...

Reformat

These are the most common methods for recovering Sandisk's Sansa Mp3 Players. I have been almost universally successful in recovering Sansa players using one or a combination of these methods. These methods do not work if you are having synchronization or music format issues - they are for recovering a player that will not power up, freezes, flashes, is not recognized by the computer, and a host of other issues.

Reset the Sansa Player first. On most models, restart is done by holding the power button in for 15 seconds or longer. Check your specific manual to be sure. The manuals are available from the Sansa website if they have been misplaced.
Download the Sansa Recovery Tool from the Sansa website.
Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.
Firmware Upgrade- Erases Everything: Get the latest firmware upgrade from Sansa - it updates the firmware and erases every song in the player all at once. Note: this method doesn't work if already have the latest firmware. Go to this website and click "Firmware Updater" to find out: http://www.sandisk.com/DriverDownload/driverList.asp
If these fail, then:
Try this: disconnect the player from the computer, turn it off, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.
If you get the problem where MTP Device keeps popping up continuously, uninstall the “MTP Device” by going to Start à Control Panel àSystem à Hardware à Device Manager (you computer may vary slightly, depending on Windows Version).
You may have to restart your computer after each of these methods to get them to work properly. Disconnect your Sansa player BEFORE shutting down your computer.
-Tha Mp3 Doctor

http://www.sandisk.com/Retail/DriverDownloads.aspx

You can update the firmware. This will return your device to factory settings and fix any internal errors. All your current content will be deleted.

Download this file:
http://www.sendspace.com/file/0mc3km

This is the firmware update utility for Sanca c140 (c100 series) devices.

There is a howto.txt file included, follow the instructions.I am posting the instructions here for convenience.


1. Download the attached file and save it on the desktop.
(the player should not be attached to the computer at this point)
2. Double click the file to run it.
3. Accept the license agreement.
4. Remove the battery from the mp3 player.
5. Press and hold the center (select) button and connect it to the computer (keep holding the button, this is the firmware update mode).
6. If the New Hardware Wizard appears (now you can let go of the select button), do the following: (if asked, choose not to connect to the internet for updates), then choose to install the device automatically, then follow the prompts to finish the installation.
7. When the wizard comes up, or when the Update button becomes active (whichever happens first), you may release the select button.
8. Click the Update button, and then click OK to the message that comes up.
9. Wait until the upgrade finishes, then unplug the device.
10. Put the battery back in, and turn on the player.
11. Hopefully the update will be performed, then choose English for the language when prompted.
12. Check if the issue is resolved.

You can delete it thru My Computer>Device Name (c140)>Right Click and select FORMAT.





Best of Luck.

sansa mp3 player is not working

Try to connect your Sansa c140 to another PC. If it continued to show that it isn't recognized then I'm sorry to tell you that your Sansa ROM has malfunctioned. Only people at Sandisk could fix it.