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Look your box is 800se it is not 800HD...
800se and 500HD must be connect mini usb cable and lan cable also to gather then follow
(Flashing by Null modem cable only without Network lan) by choosing Advanced 2
800se and 500HD must be connect mini usb cable and lan cable also to gather then follow
(Flashing by Null modem cable only without Network lan) by choosing Advanced 2