If you used the test point to flash a ROM, you may need to perform a Hard Reset via Recovery Mode (Hold Power + Volume Up ) to clear old cache data and ensure a smooth first boot.
: A high-quality Micro-USB cable to handle data transmission without random dropouts. Step-by-Step Procedure to Use the JMM-AL10 Test Point
Reattach the internal battery ribbon connector to the motherboard.
When software tools fail to communicate with the device, technicians must turn to the last resort: . This method forces the device into Meta Mode or Download Mode , allowing the PC to reconnect and re-flash the stock firmware.
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The motherboard is fragile. Do not apply excessive force with tweezers, as this can break the motherboard components.
Removing the Google account lock after a factory reset.
or bypass FRP (Factory Reset Protection) when standard software methods fail. Unbricking
. However, specialized repair platforms sometimes maintain internal libraries of test point diagrams. For example, a Chinese repair site offers official factory service diagrams for the similar JMM-AL00 (another Honor V9 Play variant). Professionals often gain access through Chimera Tool , which supports the JMM-AL10 and may provide test point details and software automation for advanced repairs. If you used the test point to flash
Open your preferred flashing tool (e.g., SP Flash Tool).
Use a pair of metal tweezers to touch that specific gold point and a metal shield (ground) simultaneously.
: Recovering a "dead" device that cannot boot into Fastboot or Recovery mode.
If it displays as Unknown Device or Qualcomm HS-USB Diagnostics , your drivers are missing or the test point short was released too early. Disconnect the cable and repeat Step 3. Flashing Firmware via EDL Mode When software tools fail to communicate with the
If the JMM-AL10 is stuck in a boot loop, shows a black screen, or fails to boot due to a corrupt bootloader, kernel, or system partition, the test point can force the device into a mode that allows a full stock firmware flash.
The risks involved are significant. Physically, the JMM-AL10 is a compact device; prying open the frame without damaging the ribbon cables connecting the display, battery, and fingerprint sensor requires patience and the correct tools. Furthermore, improper shorting of the wrong contacts can short-circuit the mainboard, causing irreparable damage. There is also the software risk: flashing incorrect firmware during the EDL session can corrupt the baseband (modem) partition, rendering the device unable to make calls, a fate often worse than being bricked.
Unbricking the Huawei JMM-AL10: A Complete Guide to the Test Point and Factory Mode
