hello! i'm having the same problem!!
its the second time it happens... When I was recording some tracks with SonicStage, the battery of my Sony MZ-NE410 worn out and I received a "low bat" warning before the device went off.
After replacing the old battery, my NET MD DITN'T OPEN after pressing the eject button anymore. And so, the disct doesnt come out.
what can I do? this is the first time it happens (I had to pay $20 to get it fixed at a local Sony Support Center, but I'm getting a little frustrated with my device because it uses too much of the battery capacity when recording).