Boot Loader Corruption

Model-Specific Notes: • T-Series (T1700, T850, T950) / Z-Series (Z6, Z9+): Accessing the pre-boot menu is crucial. It often involves holding down the power button and one or more control panel buttons during startup. The exact combination varies by model. Refer to the specific service manual. Expert Insight: This is a severe error. If the pre-boot menu cannot be accessed to force a firmware recovery, it typically indicates a hardware failure of the main PCA or the embedded storage. Ensure the USB drive used for recovery is formatted to FAT32 and contains only the .fmw file in the root directory. Sometimes, trying multiple USB drives can help rule out a faulty drive. If all recovery attempts fail, the main PCA will likely need replacement.