My Sansa won't turn on or off

As I thought, you’re attempting to put the wrong firmware on it. According to your screenshot, the file name is m300a.bin.

If you go to this page here on the forum & download from the link that says

Manual Firmware update

Firmware Download for All Regions - Click here to download (you can actually click on this link; it will take you directly to the download), it will download a file named “clipplus01.02.18.zip”.

This is a compressed file. Once downloaded to your computer, click on it and it will extract your firmware file “clppa.bin”. THIS is the file you copy to your root directory; just as you did the other one. When this is copied, unplug your player and it should install the lateast firmware for you and you’ll be in business. :wink:

You can delete the m300a.bin file.