If you have followed this guide and still see a yellow exclamation mark, your issue is likely a or a BIOS corruption —requiring a motherboard repair or EC (Embedded Controller) reflash.
However, these devices are notorious for driver issues. A missing or corrupted I2C HID driver can result in a non-functional touchpad or touchscreen, often marked by a yellow exclamation mark in under "I2C HID Device." i2c hid device install
Never force-install a generic "HID-compliant touchpad" over an I2C HID device. Always trace the problem back to the Intel Serial IO controller (for Intel systems) or AMD GPIO controller (for AMD systems). If you have followed this guide and still