A high-quality data-transfer cable (avoid charge-only cables).
On your Windows PC, right-click the Start Menu and open Device Manager . Expand the Ports (COM & LPT) section.
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. jmm-al10 test point
For those interested in learning more about the JMM-AL10 test point and Huawei device repair, here are some additional resources:
A test point is a specific set of exposed copper pads or vias on the phone’s motherboard. By creating a temporary short circuit (usually connecting the point to ground), you bypass the device's normal boot sequence. This forces the processor into a low-level waiting state for a factory downloader protocol (like Huawei’s Handset or USB 1.1 mode). If the JMM-AL10 is stuck in a boot
Double-check that the correct COM port is displayed at the top of the utility screen.
Take your metallic tweezers and press down firmly on the JMM-AL10 test point pin(s). If it is a single-pin test point, touch one tip of the tweezers to the pin and the other tip to a gold metal shield nearby (ground). This forces the processor into a low-level waiting
Once the computer plays the "hardware connected" chime, release the tweezers immediately. The software should register the device as a or Preloader port. Supported Software Packages
This article provides a deep dive into the —what it is, where to find it, how to use it, and the risks involved. By the end, you will understand how to force this device into Meta Mode or Download Mode to restore it from the dead.