Force factory state using the physical pin-short trick.
Click to format, map out bad blocks, and write fresh firmware. When to Walk Away: Physical vs. Logical Failures
A frequently overlooked symptom that accompanies this error is excessive heat. Users often report that while the drive shows up as "Unknown [FA00]," the controller chip itself becomes noticeably hot to the touch. This overheating is a direct consequence of the firmware failure. When the firmware is corrupted, the controller chip can enter an uncontrolled loop, constantly trying to initialize the NAND flash and failing. This continuous, fruitless activity consumes power and generates significant heat, which can be a clear indicator of a deep-seated firmware malfunction or a short circuit within the controller.
The "Alcor Micro Unknown FA00 FW FA04" error typically surfaces when a USB flash drive or SD card reader using an Alcor Micro controller malfunctions. Users often report that the device becomes "Hot"—meaning it is either physically overheating or showing up as a "Hot Plug" device that Windows cannot properly initialize. What Does the Error Mean? alcor micro unknown fa00 fw fa04 hot
Process:
Firmware Corruption: The internal software of the USB controller has crashed.
: Back on the main screen, click "Start" (or "All Start"). The process will begin. Do not interrupt it. Force factory state using the physical pin-short trick
This specific state is a notorious symptom among flash drives utilizing Alcor Micro controller chips (such as the AU6989SN-TA or AU6989SNCS-TA series). This comprehensive guide analyzes why this error happens, what the firmware codes mean, and how to safely determine if your drive can be saved or if it has met its end. What the Error Codes Mean
This stands for . The string "FW FA04" indicates the specific firmware version currently loaded on the chip.
0 MB on a 32GB USB stick - Storage Devices - Linus Tech Tips When the firmware is corrupted, the controller chip
Common causes:
On Windows:
: A USB SD/microSD card reader or a low-cost USB flash drive using Alcor Micro’s AU6xxx/AU93xx series chip.