When a USB flash drive operates normally, diagnostic tools query the controller for its model and firmware version. Here is what happens when it fails and outputs this specific combination:
: Overheating often precedes a total electrical short that can damage your computer's USB port.
Look for "Generic USB Hub" errors or "Unknown Device" listings. 💻 Advanced Recovery (AlcorMP)
If the drive burns your finger, software likely won't fix it. The controller or a capacitor has likely failed. Conclusion
Documentation often identifies this "Unknown FA00" state as belonging to the Alcor AU6989SN-TA or AU6989SN-GT series. alcor micro unknown fa00 fw fa04 hot
+-------------------------------------------------------+ | AlcorMP (Mass Production Tool) [ _ ][ X ] | +-------------------------------------------------------+ | [ G: ] Alcor FA00 -> Ready to Flash | | | | +------------+ +------------+ +---------------+ | | | Setup (S) | | Start (A) | | Driver (D) | | | +------------+ +------------+ +---------------+ | +-------------------------------------------------------+
If your drive does not get instantly hot and shows a valid Flash ID, you can flash the controller using . Prerequisites
When that device also starts getting , it’s time to stop and troubleshoot. Here is what is happening and how to fix it. What is Alcor Micro FA00/FA04?
The exact version of AlcorMP that matches your Flash ID. You can find these tools on database archives like USBDev or FlashBoot. Repair Procedure When a USB flash drive operates normally, diagnostic
If AlcorMP refuses to detect the device because the controller is permanently frozen in its FA04 loop, you must manually bypass the boot code by shorting the data pins.
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.
: Use the ChipGenius utility or Flash Drive Information Extractor from USBDev to get the true Controller Part-Number and Flash ID (FID).
These are hexadecimal status codes or partial firmware versions used by the controller during its boot sequence. 💻 Advanced Recovery (AlcorMP) If the drive burns
If you are currently staring at this error, your data may still be recoverable using the freezer trick, a firmware reflash, or professional chip-off recovery. But let this be a lesson: when a USB drive gets in both name and nature, it's time to let it rest—and invest in a drive with proper thermal management.
A Windows PC (preferably Windows 10 or older, as Alcor drivers lack signatures for modern security environments).
Search for the AlcorMP version that matches your controller and the FA04 firmware revision.
Using a sewing needle or fine-tipped tweezers, carefully short two adjacent data pins (avoid shorting power pins directly to ground).