My sansa e260 is frozen

hb n b,nb.lc klc gh

sounds like a firmware program problem and will have to be replaced. You could download an updated firmware but you will have to get a pc connection. 
After your device is plugged in, are you able to go to  "my computer" and see a drive folder that has your device on it.

Try to hold down the off button and restart it, if it still shows the same screen take it for servicing.

connect it to the comuter then get sansa updater and reinstall the firmware on the sansa

Mine was a bit more FUBAR I guess. I have a Sansa e260. I had rockbox on it, went to switch back to the firmware. Uninstalled rockbox and on reboot... the e260 was refreshing the database and then came to a frozen green screen.

My e260 was already in MSC mode. I did the steps above but was still stuck.

The solution that worked was one posted by "Slaughter" on anythingbutipod.

The ultimate fix for all e2xx v1 problems - Format, enter recovery mode, downgrade firmware Link (you'll need to format the drive), reinstall newest firmware via newest Sansa Updater, reload tunes.

try to format

did they send a recovery programme.

try holding the power and play buttons for 20secs together if that doesn't work you proably busted your screen and will need to send it in for repairs

that happens to me too. i think the problem is that your computer can't like, sense that it's plugged in, so your battery's dying out, and the computer wont charge it

I hate to say it, but you have to replace it.