caohuuvuong , the firmware you have flashed in is not compatible with your player. The screen driver is different for your screen's hardware, hence the screen is inverted.
What i'll suggest is to try all the v9.0.xx series firmwares. But if non-work, then perhaps you have no choice but to use back this firmware which is inverted.
Does the player function properly with the screen inverted? Like playing music, videos, FM radio, etc?
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Why are clones called MP4 Players, when they don`t play .MP4 at all?
It`s like an MP3 Player which plays Music CDs only.
T39 doesn''t sound as good as my T29
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