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I turned my router off, fully charged, and now it will not turn back on.

Shantai Ellis  that sounds like an issue with the power adapter. Check the adapter for proper voltage. Or  replace the power adapter with one equivalent to the original to eliminate a bad adapter. You may consider replacing the power adapter with one equivalent to the original to eliminate a bad adapter. You also want to check these guides to check your router further Netgear WGR614v9 Repair