Before diving into complex tools:
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.
Before starting, ensure you have:
For the specific "FA00 FW FA04," you need the legacy driver package from Alcor. Microsoft no longer distributes this via Windows Update.
If the standard MP tool fails to detect the flash memory due to the "Unknown" state:
Alcor Micro uses specific "MP Tools" (Mass Production Tools) for different controllers.
If the drive is recognized by Windows at all (even as an "Unknown Device"), use ChipGenius.
The combination of Alcor Micro, Unknown Device, and Heat is rarely a driver issue; it is almost always a hardware failure.
If the drive contains irreplaceable photos or documents, stop attempting software fixes immediately, as this can worsen the hardware state. Professional data recovery services can often solder a matching controller chip onto the board to extract the data, but this is a costly procedure best reserved for critical files.
Have you managed to fix an Alcor Micro FA00 device using MP tools? Let us know in the comments below! alcor micro unknown fa00 fw fa04 hot
If you’ve plugged in a USB drive or SD card reader only to see "Alcor Micro USB Device" with a generic icon and a strange firmware ID like FA00 or FA04, you aren't alone. It’s a common sign of a corrupted controller.
When that device also starts getting hot to the touch, it’s time to stop and troubleshoot. Here is what is happening and how to fix it. What is Alcor Micro FA00/FA04?
Alcor Micro makes the "brains" (controllers) for many budget-friendly USB sticks and card readers. When you see "FA00" or "Unknown Device," it means the device has entered Fail-Safe Mode. Firmware Corruption: The internal software is "stuck."
Identification Failure: Windows sees the chip but doesn't know what it’s supposed to be.
Thermal Runaway: If it’s getting hot, the controller is likely stuck in a high-power loop or has a hardware short. ⚠️ Warning: The Heat Factor If the device is physically hot, proceed with caution: Unplug it immediately if you smell burning plastic.
Heat usually indicates a hardware failure (a shorted capacitor or NAND chip).
Software fixes rarely fix physical overheating and may cause the device to "pop." How to Fix the "Unknown Device" Error
If the heat is mild and you want to try a software recovery, follow these steps: 1. Identify the Chipset
Download a tool like ChipGenius or Flash Drive Information Extractor. Look for the VID (Vendor ID) and PID (Product ID). For Alcor, the VID is usually 058F. 2. Find the Alcor MPTool Before diving into complex tools: Alcor Micro devices
Once you have the specific controller model (e.g., AU6989SN), you need the Alcor MPTool (Mass Production Tool). Search for the version that matches your firmware (FA04).
Note: These tools are often hosted on enthusiast sites like FlashDrive-Repair or Russian tech forums (as they aren't officially released to consumers). 3. Flash the Firmware Run the MPTool as Administrator.
Click "Setup" and keep settings on default (unless you are an advanced user). Hit "Start."
This will "low-level format" the drive and reload the FA04 firmware. ⚡ The Quick Verdict
If it's just "Unknown": A firmware flash with MPTool will likely bring it back to life.
If it's "Hot": The hardware is dying. Back up any data immediately (if it even mounts) and toss the drive. A $10 USB stick isn't worth frying your computer's motherboard port. To help you find the exact recovery tool, let me know: Did this happen after a firmware update or suddenly? Do you need to save the data, or just fix the drive? What is the VID and PID from ChipGenius?
I can point you to the specific download link for your controller version.
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 The combination of Alcor Micro , Unknown Device
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.
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