Your boxes are clones.
You've been hit by the update spark done which has removed the boot loader from the box.
It can be repaired as I have done them in the past. To stop happening in future make sure you disconnect from the net whrn using spark. NEVER use a clone box in spark online.
I have 5 clones running and they are all running e2 .
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Heres a video of me repairing one.
As you can see it involves a lot of wire and cables.
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