ReFlashing Z Gemma star 2s

Hi Guys,

trying to reflash my ZGemma star 2s box but with no luck...put the image onto my USB and put it into the box and FLSH comes up on the screen but then it stays there and nothing happens, box doesnt reboot...

Any suggestions?
 
It normally stays on flash for a few mins and then loads up to 100 as normal. How long did you leave on flash mate?

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