If you shut down the miner while the leds are blinking there is a possibility that flashing process is not successfully flashed it means the program still corrupted.

What you need to do is flash it again with SD card and let the led red and green blinking until the miner will automatically restart itself and led stops blinking.

Now you can take back the jumper and power on the miner for 5 minutes perform this hard reset. Hold IPreporter/Reset button for 15 seconds then release then check it again with angry IP or any scanner to find the miner's IP.