Question about RCA OPAL M4001 MP3 Player

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HELP my mp3 player says boot error! format unit. How do i get my music to play again?

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The Opal has a reset hole on the back of the unit in which a toothpick (non metallic) can be inserted to reboot the player. If this does not work, I suggest that you reformat the player by using the Windows format command on the unit. To reformat the memory:
Right click on the device within the Explorer or My Computer window
Select the format command (full format) to reformat the internal memory of the device.
Reinstall the firmware from

Posted on Dec 15, 2008


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Posted on Jan 02, 2017


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I hade just that prob. "format error" used to display. I did this:
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2.- in the walkman went to menu/initialize/format
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3.- THEN plugged into the PC and transfered songs with Sonic
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boot error format unit

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