Stuck in Boot Loop

Nexus 10 stuck in boot loop. It starts up like normal and lets me access one or two screens - will not let me delete anything - then screen blanks and restarts. Though that it might be the battery, but it is the same while still connected to the charger. I tried the usual reset to factory settings but it sticks at “wiping data / formatting” and never gets past that. It has stayed in that screen for several days. Need some HELP, Please.

Tried the “disconnect battery” but that changed nothing.