Mine is SanDisk SDMX4-2048-A70 Sansa e250 2 GB MP3 Player with microSD Expansion Slot and it stopped working when i unplugged it from the pc before i started to download things but any ways u know how u can lock it well i have to push a button to start it. so i had it on lock and held the button down for like 20 sec's counting slow, then that didnt work so i put it back on lock and held it again for 20 sec's again and it worked!! it turned on then i had to unlock to turn it back on to use it again!!! yeah!!! so give that a try...
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Mine is SanDisk SDMX4-2048-A70 Sansa e250 2 GB MP3 Player with microSD Expansion Slot and it stopped working when i unplugged it from the pc before i started to download things but any ways u know how u can lock it well i have to push a button to start it. so i had it on lock and held the button down for like 20 sec's counting slow, then that didnt work so i put it back on lock and held it again for 20 sec's again and it worked!! it turned on then i had to unlock to turn it back on to use it again!!! yeah!!! so give that a try...