Sandisk SDmx1 frozen on pause. Won't play music

just find firmware and off device trun on hold button and press +and update ur mp3 firmware ok

Check out this tip posted here.
Sansa Mp3 player frozen? How to reset and...

Sandisk Digital Audio Player link
http://kb.sandisk.com/app/answers/detail/a_id/836

is releated to this file in pdf format (visible with adobe reader)
http://mp3support.sandisk.com/downloads/um/dap-um.pdf

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

pushing the play button on the side toggles between play and pause. Make sure the hold switch isn't in the hold position.

I would recommend you to go to the sandisk site to update the firmware on your device even if you have done so in the past 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

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

I would recommend you to use the device itself to format it and see what happens...if that doesnt solve the problems go to the sandisk site to get a firmware upgrade...here is the link below..

http://sandisk.com/Retail/Default.aspx?CatID=1376

Go to www.sandisk.com and download the instructions for this model. They are about 30 plus pages. Look on p.11. Good luck!

i had the same problem and they told me it was a firmware problem on models received around xmas.