Alcor Micro: Unknown Fa00 F W Fa04 Fixed

Alcor Micro FA00 ) usually indicates an Alcor AU6989SN-TA controller that has lost its flash ID (FID) or has corrupted firmware, often resulting in a "No Media" or "0 Byte" error. Recovery Steps for Alcor FA00 / FA04

Setup

In , ensure Factory Mode and Auto Disc Size are selected. alcor micro unknown fa00 f w fa04 fixed

Edit the INF (If necessary):

In some cases, the .inf file explicitly lists only PID_FA04 . You may need to duplicate the lines in the .inf file, changing FA04 to FA00 to trick Windows into believing this driver is valid for the Unknown Device. Note: This requires disabling Driver Signature Enforcement in Windows. Alcor Micro FA00 ) usually indicates an Alcor

Before you do anything, let's manage expectations. You may need to duplicate the lines in the

A USB device with Alcor Micro chipset initially shows:

The primary way to fix firmware issues is through a dedicated "Mass Production" tool designed for Alcor chips.