Re: tried all the ways
resetting successful.
1.remove the usb disk etc. (removable disks)
2.plug in the device but off position.
3.short circuit both right 4 pin and left 4 pin at the same time.
4.turn on the switch.
5.open the "MP3 Player Upgrade Tool"
6.press "select new firmware button"
7.find the original dumb.bin
8.begin upgrading.
9.pop up a new error.
at this time reset 1 more time.
1.2.3.4.5.6. the same.
7.found my wrong firmware that upgraded before
8.begin upgrading
9.upgrading successful
shortly I must find a full firmware upper than I had. right?
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