ColinTaylor
Part of the Furniture
If the AC66U is like N66U (which is likely as the hardware is almost identical) you have to ignore the "progress" being indicated. Flashing in rescue mode is very slow on those models. Put router in rescue mode and upload the new firmware. Ignore any messages saying it's completed - it hasn't. Wait for 1 hour for it to complete, then power cycle the router.I see thanks. I dident see a guide.
So I used the rescue tool and it uploaded fine, then it went for the reset and 1% and then done. And the stock FW is still on the router after reboot. Am I missing anything?