The box is certainly not dead (it's impossible to break it, it's always recoverable), try to use the software from Yassinov, the OptiFlasher to fix it, and you have the ssl89 that you can flash alone and just reboot it (without flashing any image).

As if you flash an image, we don't know what you flash and this could be the fault... so only the ssl89 or/and optiflasher fixing process.

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