Installation issues: Corsair H100i Capellix Elite AIO cooler with ASUS ROG STRIX B450-F MOBO

Building new computer for my son. Installed Corsair AIO cooler on the ROG STRIX B450 MOBO (AMD Ryzen 5 3600XT CPU), and connected the pump tach cable to the cpu fan header per instructions.  Started computer, and everything blinked red and computer shut down. Repositioned pump tach cable to the AIO pump header, and everything started working normal. 

Loaded Windows 10 Home and started to update software/drivers through the ASUS updater. Restarted machine and went back into blinking red/shutdown mode.

Removed AIO cooler and installed standard fan cooler, and system operating OK now.  Want to get the AIO cooler working to set up overclocking.

Thoughts on how to troubleshoot?  Currently looking through software and BIOS to identify if settings have been screwed with.



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