Hi and welcome.
Did you do a factory reset?
I did a quick search on this forum for the model and it turned up a lot of interesting stuff. Maybe read through the other replies to see if you can find what you need. I found the firmware, but it looks like you'd need to flash the EEPROMS outside of the unit. Depending on the specific device family, there are quite a few cheap Chinese programmers that work just fine with generic tools to erase/load/validate the chips. Quite a few of the people posting are still active, so may reply to a P.M.
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