Alcor Micro controllers (e.g., AU94xx, AU93xx series) are widely used in USB hubs, smart card readers, and flash drive controllers. When a device enumerates as an with FA00 (Product ID) and FW FA04 (firmware revision), it indicates a firmware crash, power fault, or overheating condition — often flagged as “HOT” in diagnostic tools.
If the drive is not detected, click "Refresh" . If still missing, you may need to manually enter the VID (058F) and PID (6387) in the "Driver" settings. Configuration: Go to Settings (password is often blank or 1234 ). Set MP Mode to "Capacity optimize" . Set Scan Level to "Full Scan" .
Download and unzip the correct AlcorMP archive.
If you plug in a USB flash drive and notice it becomes while Windows ChipGenius or flash drive repair utilities report a Controller Part-Number: Unknown [FA00] - F/W FA04 error, your drive is suffering from a critical hardware or microcode failure. alcor micro unknown fa00 fw fa04 hot
Use tools like to identify the specific controller model (e.g., AU6989SN) and the Flash ID code. Step 2: Use Alcor MP Tools
Download a version of that explicitly supports the FA00 controller, such as: AlcorMP v16.09.30.00 or newer.
The Alcor Micro tool requires you to know what type of flash memory is inside your device (e.g., Micron, Samsung) to select the correct firmware. Alcor Micro controllers (e
If you would like to pinpoint the exact recovery tool version for your drive, tell me:
If the chip becomes painful to touch within 5 seconds, the controller has an internal hardware short-circuit. The drive is completely dead and cannot be repaired by software. Unplug it immediately to prevent damaging your computer's motherboard.
The combination is a specific failure signature for Alcor Micro controllers in a bootloader or thermal fault state . Recovery requires identifying whether the cause is thermal, power-related, or firmware corruption. If the IC remains cool but still shows FA00, attempt firmware reflash. If hot, address cooling and power first to prevent permanent damage. If still missing, you may need to manually
Sometimes the "Unknown Device" is simply a missing driver for the Smart Card Reader portion of the chip. Microsoft Update Catalog for official Alcor Micro USB drivers.
Before investing hours into software flashing tools, use this quick diagnostic reference table to see if your Alcor drive is salvageable: Firmware corruption or bad sectors Re-flash with AlcorMP Production Tool. Scalding hot instantly, returns FA00 with No FID Hard internal component short circuit