If I didn't safely remove hardware

I really don’t remember if when I charged my Sansa Express the last time if I used the safely remove hardware or not (I’ve got another Sansa that uses batteries and doesn’t require that so I might’ve forgotten.

So now it only turns on for a second and then shuts off.

I’ve followed the instuctions on re-setting and adding new firmware but nothing is working.

Did I ruin it?

Thanks!