Alcor Micro AU9410-based USB 3.0 hub, connected to laptop via USB-C adapter. After connecting a high-power external HDD, hub became hot to touch, disconnected, and re-enumerated as “Unknown USB Device (Device Descriptor Request Failed)” with PID FA00, FW FA04. Cooling down for 10 minutes restored normal operation. Permanent fix: used externally powered hub.
controller (or similar series) entering a "test mode" or "fail state" because it cannot communicate with the flash memory chip. Why Is It "Hot"? alcor micro unknown fa00 fw fa04 hot
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