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Solved... finally found a Nemesis image that would boot and see the tuner...
(2.6-SVN-110r0)
Had to select that image for download, download it, hit 'write bootloader/update' then back again to 'write image' (to get out of download area)..
Hit 'Do job'
Power up.
Wait for 'enter IP on display' (which of course the 500HD doesn't have)
Power off
Hold front panel button and power up.
*keep it held*
enter the IP of the box (which I already knew)
*keep it held*
wait for flash until 'successful'
*release button*
power down
power up
*SUCCESS*
(2.6-SVN-110r0)
Had to select that image for download, download it, hit 'write bootloader/update' then back again to 'write image' (to get out of download area)..
Hit 'Do job'
Power up.
Wait for 'enter IP on display' (which of course the 500HD doesn't have)
Power off
Hold front panel button and power up.
*keep it held*
enter the IP of the box (which I already knew)
*keep it held*
wait for flash until 'successful'
*release button*
power down
power up
*SUCCESS*