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Ok in this case try this:
See this topic and try with "Flashing by Null modem cable only without Network lan"
1-Download bootloader "secondstage_76-r1" from attach
2- Flash it to box
3- See what happen after unplug and plug box
If booting then you can upgrade your bootloader for last one 84b and use last image if not try to put Hyperterminal details here..see this topic
P.S: Make sure the sim is in correct place exactly.
See this topic and try with "Flashing by Null modem cable only without Network lan"
1-Download bootloader "secondstage_76-r1" from attach
2- Flash it to box
3- See what happen after unplug and plug box
If booting then you can upgrade your bootloader for last one 84b and use last image if not try to put Hyperterminal details here..see this topic
P.S: Make sure the sim is in correct place exactly.