When an Alcor Micro device (likely a USB flash drive or card reader) shows up as an "Unknown Device" with an identifier like FA00 FW FA04
and becomes physically hot, it typically indicates a firmware corruption or a hardware failure often seen in low-quality or "fake" flash storage. Why It's Happening
Firmware Corruption: The "FA00" identifier usually appears when the Alcor controller chip enters a "recovery" or "low-level" mode because it cannot load its primary operating firmware.
Hardware Short/Overloading: Excessive heat in a USB device that isn't working often points to an internal electrical short or the controller chip working at high cycles to resolve a communication error.
Counterfeit Hardware: Many Alcor Micro-based drives sold at low prices are "fake capacity" drives. When they fail, they revert to their base controller ID (FA00). Recommended Fixes
If you want to try and recover the device, follow these steps:
Unplug Immediately: Overheating can damage your computer's USB port. Let the device cool down before trying further steps. Use Alcor Micro Production Tool:
Search for "AlcorMP" or "Alcor Micro Production Tool." This is specialized factory software used to re-flash the controller. Note that using this tool will wipe all data on the drive.
You can also contact technical support for specific utilities at Alcor Infotech. Driver Reset: Open Device Manager. Find the "Unknown Device" or "Alcor Micro USB" entry.
Right-click and select Uninstall device, then restart your PC to let Windows try to re-identify it. alcor micro unknown fa00 fw fa04 hot
Check for Counterfeits: If the drive was marketed as high capacity (e.g., 512GB or 1TB) but was very cheap, it is likely a fake. Discussion on HP Support Community suggests these drives often fail and become "unknown" after a small amount of data is written.
Warning: If the device continues to get "burning hot" within seconds of being plugged in, it likely has a physical hardware failure. Continued use could cause a fire hazard or damage your PC's motherboard. fake HP usb flash drives - HP Support Community - 5995925
This issue typically indicates a hardware failure or a critical firmware mismatch in your USB drive's Alcor Micro controller
. When a drive shows as an "Unknown Device," displays an "FA00" error code, and becomes physically hot, it usually means the controller chip is either short-circuited or stuck in an infinite boot loop due to corrupted firmware. Core Problems Identified FA00 Error / No FID
: This code often appears when the controller cannot communicate with the NAND flash memory chip (the part that actually stores your data). Overheating
: Rapid heating is a sign of an electrical short or the controller drawing excessive power while trying to initialize failed hardware. Firmware Mismatch
: The "FA04" or "FA00" designations are internal Alcor status codes indicating the controller model (like the AU6989SN-TA ) is not properly identified by standard drivers. Recovery and Fix Attempts
If you want to try and "revive" the drive, follow these steps, but be aware that physical heat often suggests the hardware is permanently damaged.
This specific error signature—Alcor Micro Unknown [FA00] F/W FA04—is a classic indicator of a corrupted or "fake" Alcor flash drive controller. When these devices become "hot" and "unrecognized," it typically signifies a critical hardware or firmware failure. The "FA00" Technical Meaning When an Alcor Micro device (likely a USB
Controller Identity: The code [FA00] with firmware FA04 generally appears when the USB mass storage production tool cannot properly communicate with the controller chip.
Aka AU6989SN-TA: Documentation often identifies this "Unknown FA00" state as belonging to the Alcor AU6989SN-TA or AU6989SN-GT series.
"Fake" Signature: This specific "FA00" identifier frequently pops up in counterfeit or low-grade flash drives (often branded as Kingston or generic 2TB drives) where the internal hardware does not match the reported capacity. Why It's Getting Hot
If the device is "scalding hot" to the touch while plugged in:
Internal Short: A hardware failure in the Alcor controller IC or the NAND flash memory is likely causing an electrical short.
Overvoltage/Overload: Cheaply made generic drives often lack proper power management, leading to the controller overheating when it fails to initialize the firmware.
Warning: Disconnect it immediately. Extreme heat in a USB device can damage your computer's USB port or pose a fire risk. Troubleshooting & Recovery
Because the device is physically overheating and returning an "Unknown" status, software fixes are rarely permanent, but you can try these steps:
Low-Level Formatting: Tools like AlcorMP (Alcor Micro Production Tool) are sometimes used to "re-flash" the firmware, but this requires finding the exact version for the AU6989 series. Observed Behavior
Flash ID Check: If the Flash ID (FID) comes back as 898989898989 or similar nonsense, the memory chip is physically dead.
Data Safety: Do not keep the device plugged in if it is hot. If the data is critical, you should consult a professional Data Recovery Specialist.
If you'd like to try a firmware flash, do you have the exact VID and PID (found in Device Manager)? This helps in finding the correct mass production tool version. Flash Drive Repair - Facebook
It sounds like you’re troubleshooting a device that shows up as "Alcor Micro Unknown FA00 FW FA04 HOT" — likely in Device Manager (Windows) or lsusb (Linux).
Let me break down what that likely means and how to help.
FA00 – Not documented in standard ALCOR public datasheets or MP tool error lists. Likely a vendor-specific or low-level hardware communication fault.FA04 – Possibly a pre-release or corrupted firmware build.Field reports indicate that FW FA04 has a known bug: after several unsafe ejections or power loss events, the controller's internal temperature sensor locks to a maximum value (e.g., 0xFF). The driver interprets this as "hot," even if the drive is physically cold.
Alcor Micro devices are commonly used in flash card readers, which allow you to read and write data to various types of memory cards. These devices communicate with your computer through a USB connection and are generally plug-and-play, requiring little to no setup.
Warning: Only attempt if data is considered lost otherwise.
Why this works for FA04: Many users report that FW FA04 has a temperature lockout bug that only clears when the physical sensor falls below 10°C.