Most of the links are dead, the ones with Chinese characters
on the file name specially.
From the others, the MP3 Player Upgrade Tool
only accepted the first one I downloaded,
which was: BO-25002 CS1813B2F2 LSC_91N207H_A1_TD018(TB);
and my little monster keeps the same:
black screen and working only as flash disk.
I tried others, among the two at the end of the list (page 2),
which had Chinese characters on the file's name,
but the Tool said: "file protocol is not the same as the firmware before"
and closed.
I am starting to believe my problem is nothing that can't be fixed
with a sledge hammer and a trip to Radio Shack.
(Too bad I can't afford any of those two)