[SOLVED] Red light flashes next to barrel-port

[xyzzy]

From
https://www.ti.com/lit/ds/symlink/bq2417...52FBQ24171
,,STAT pin,,
It indicates various charger operations:LOW when charge in progress.HIGH when charge is complete or in SLEEP mode.Blinking at 0.5 Hz when fault occurs,including charge suspend,input over voltage,timer fault and battery absent

Does the bq241717 reaching the 120°C thermal slowdown count as "charge suspend, input over voltage, time fault, or battery absent?"

If you read TI's board for the bq24171, it seems a lot of things can trigger fault flashing, and it can be hard to tell what is the cause.