If you have upgraded to HarmonyOS, you cannot directly flash an EMUI dload file. You must first use the "HarmonyOS Rollback Package" via HiSuite on PC, then flash the EMUI flash file.
If your Nova 5T is completely unresponsive—won’t turn on, stays on a black screen, or only vibrates—the software partition may be corrupted. Flashing the full firmware can resurrect it. nova 5t flash file
: Provides a collection of Official Stock Firmware for various Huawei models, including the Nova 5T. If you have upgraded to HarmonyOS, you cannot