Zenithink c91 wont upgrade

Conr

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Jun 10, 2012
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hi guys i have a zenithink c91 3a and it was flashed and i have put the zt update on micro sd it says press camera putton about 3 times then says starting kernels then shuts down can you please help me fix this problem:)
 
i also have to press reset pin every time i turn on
 
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