Does your PC make a "Ding-Dong" sound when you plug it in? If yes, the hardware is alive. If your PC is completely silent, the battery may be dead, or the PMIC (Power Management IC) is fried. This guide assumes you get a USB connection sound.
Under "Ports (COM & LPT)", you should see a single device: Huawei Mobile Connect - 3G Application Interface (COM X) . If you see this, your bootloader is alive but corrupted. If you see "Unknown Device" or nothing, repeat the button sequence.
This tool sends raw bootcode to the processor.
If your PC does not recognize the device AT ALL (no connection sound), or if the COM port keeps disconnecting every 2 seconds, you have a deeper issue. You likely need a or UART repair. Huawei E5573 Dead Boot Repair
| Error Message | Cause | Solution | | :--- | :--- | :--- | | "Failed to open COM port" | Driver conflict or device locked | Uninstall Huawei PC Suite. Use Zadig to remove WinUSB. | | "Wait balong v7 boot" timeout | Wrong button sequence | Repeat Step 1. Try Volume Down instead of WPS. Disconnect battery for 60 seconds. | | "Flash erase failure" | NAND bad blocks | Run AT^ERASEFLASH=1 via Terminal if possible. Otherwise, skip this firmware; find a "Factory Repair" .bin. | | MUD says "Result: FAIL (Board ID mismatch)" | Wrong firmware | You have an E5573s-856 trying to flash E5573s-320. Find the exact match. | | Device reboots every 2 seconds | Boot loop due to dead battery | Replace the battery. The PMIC cannot stabilize without a healthy cell. |
A dead boot occurs when the device's bootloader—the essential software that initializes the hardware and loads the main operating system—becomes corrupted. Without a valid bootloader, the Huawei E5573 does not know how to start. It is effectively "brain dead."
In rare, fatal cases, the NOR flash chip (often Winbond or Spansion) has physically failed. You need: Does your PC make a "Ding-Dong" sound when you plug it in
For 98% of users, this is the end of the road. Buy a used motherboard from eBay.
Once you have revived your E5573, keep it alive.
: Using a tool like DC-Unlocker or a specialized firmware loader, select the correct firmware file for your specific sub-model (e.g., E5573s-320, E5573cs-322). This guide assumes you get a USB connection sound
If you are reading this, you are likely staring at that brick. Do not throw it away. In 90% of cases, a dead boot on a Huawei E5573 is . This long-form guide will walk you through the causes, the diagnosis, and the step-by-step factory-level recovery using specialized tools like Balong_USB_Downloader and Multi-User Download (MUD) .
A dead boot means the CPU is looping. We need to interrupt that loop.