In my opinion, and based on the issues, it seems to me a cpu issue or at least some issue with a voltage circuit.

Better is, (if you still have the backup from it) is to test the box with the stock fta image file.
When it still give these issues and if you have guarantee on it then it seems to me that it's better to make contact to your seller.
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Doing nothing leads to nothing.

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Johnny B.

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