Mp3 my sandisk sansa m240 mp3 player isn't working. I turn it on and sansa 1.0 gb appears on the screen but it freezes. Also when I plug it in to windows media center it says "no device detected" on the screen. Do I have to get a new one? Is there a series of buttons I have to push?

1. Are you able to turn it on ?
If so, press the the "power on" button the second time to activate the menu.
Still no luck ! Try putting in a new battery and try again.
2. You cannot "reset" anything.
3. Open up "windows explorer"
4. Scroll down the left pane of the window till you see the "sansa" removable disk
5. Right click it and select "format"
6. After formatting, try adding your files back again.
7. Use the >= button on the player tp play the songs.

Hope this has been helpful to you.

turn it off, take out the battery, then replace it, turn it back on. see if this helps.

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

My SANSA m240 opens but not working , I have replaced the battery and the thing still doesn't work. The thing is not on hold. When I plug it in to the computer it appears in my computer window but does not open & it hangs up .
What should I do? kamilsticky@gmail.com

Try going into your USB Settings on your device and ensure the unit is set to msc

i cant erase songs on it

To those that are having problems with the MP3 player not being recognized. With Windows XP there is a little Icon on your Systems Tray that is called the "Safely Remove Harware Icon". Not using this Icon when unpluging MP3''s or zip drives can cause your PC to no longer recognize it. Toshiba Satellite laptops are known for this, others probably have the same problem. The solution here is to install the latest update of the ACPI Flash Bios for the Toshiba Satellite computer. Maybe this is also the problem with other PCs. To prevent these problems allways click on the Safely Remove Hardware icon before removing the MP3 player or any USB flash drive
1 With your m240 set to MSC and connected, go to "My Computer" and "right click" on the "Sansa m240" icon and select "Properties"
2 In that window, select the "Hardware" tab
4. In that "All Disk Drives" window, highlight the "Sansa m240" drive and select "Properties" (at the bottom)
5. In that window, select "Policies"
6. And there, set it to " Optimize for Quick Removal" and click OK and OK again

I have the same problem. I called tech support 1-866-726-3475 and they talked me thru several cures. None of which worked. My unit is about 8 months old. After trying all the options, they gave me a rma number and are sending me a replacement. I think they have had some trouble with this lot of players, they were very nice and it took no prodding from me for a replacement! Good Luck1

k, so now the SanDisk sansa m240 1GB mp3 player, when you turn it on, it freezes. I have tried to change the battery and everything and it still wont work. What is happening here? others that have had the same problem. I researched this online and found out that there was a rather large bad batch of these mp3 players shipped in December. they suggest calling sandisk tech support at 1-866-726-3475 for a replacement and getting a RMA number or going back to where you bought it and exchanging it.

Youmust have instaled MEDIA PLAYER 10 , oderwise your computer will NOT see the device