Problems flashing H5

Hi, trying to flash a H5.
Getting usb message on screen.
press silver button then FLSH comes on screen.
about 30 seconds later it goes to 0 then up to 49 then freezers.
ive tried openatv 6.2 from wooshbuild infinity and openatv 6.3 direct from openatv

any help appreciated.
 
Are you getting anything on screen when it gets to 49. Should see the video wizard
If not try another usb
 
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