I am currently having the same problem.
Any help or info is appreciated.
If it's only the red flashing light but it still hashing normally you can ignore the red light because it's very common in whatsminer based on their old complaints that you can found here below
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https://bitcointalk.org/index.php?topic=2345436.msg37489454#msg37489454But if your miner can't able to detect the IP maybe the firmware of your miner is corrupted you can try to flash your miner through SD card all firmware for this unit you can download them here below
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https://www.whatsminer.com/src/views/firmware-download.htmlJust make sure to check the control board first for the exact firmware/board model.