Test Point: Jmm-al10

Title: Unbricking the Huawei JMM-AL10: A Complete Guide to the Test Point and Factory Mode

Published: April 24, 2026 Category: Hardware Repair / FRP Bypass jmm-al10 test point

Risks and Warnings: Proceed with Caution

Using the test point is considered an advanced repair technique. Here are the critical risks: Title: Unbricking the Huawei JMM-AL10: A Complete Guide

1. Permanent Short Circuit: If you short the test point to a voltage rail instead of true ground, or if you short it for too long (over 10 seconds), you can burn the PMIC or CPU. Double-check your ground source.
2. Physical Damage: Opening the JMM-AL10 risks tearing flex cables (display, touch, buttons). The adhesive is strong; take your time.
3. Battery Danger: Never use a metal tool near the battery while it is connected. Lithium-ion batteries can explode if punctured. Always disconnect the battery flex first.
4. Wrong Firmware: Flashing the wrong model’s firmware (e.g., JMM-L22 firmware onto an AL10) will result in a permanent hard brick that even the test point cannot fix.
5. Void Warranty: Opening the device and shorting the PCB instantly voids any remaining manufacturer warranty.

Method 2: For Dead Boot Repair (Using SP Flash Tool)

1. Download Firmware: Obtain the correct "Stock ROM" (scatter file format) for the JMM-AL10.
2. Launch SP Flash Tool: Run the tool as administrator.
3. Load Scatter: Click "Scatter-loading" and select the MT6737T_Android_scatter.txt from the firmware folder.
4. Select Download Only: Ensure you are in "Download" or "Format All + Download" (use the latter only if absolutely necessary, as it wipes IMEI).
5. Short test points (same as above).
6. Connect USB: While shorting, plug in the USB. Hear the connection sound, then release.
7. Click Download: Immediately click the "Download" button in SP Flash Tool. The red progress bar will appear, followed by a yellow bar. This indicates the BROM is being written.
8. Wait for completion: Do not disconnect until you see a green checkmark.

Hardware identification:

• The test points are usually two small gold/copper pads on the main board, often near the processor or under a shielding can.
• For JMM-AL10 (which uses a Kirin 659 SoC — not Qualcomm), the test point method is less common than on Qualcomm devices. However, Huawei/Honor devices do have test points for Download Mode.

Troubleshooting: Why Isn’t the JMM-AL10 Test Point Working?

Even with the correct procedure, you might face issues. Here’s how to debug them: Permanent Short Circuit: If you short the test

| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | PC makes "USB disconnect" sound immediately | Battery not disconnected | Unplug the battery flex cable. Re-short. | | PC detects "Unknown Device" | Drivers missing | Install Huawei USB COM drivers or MTK VCOM drivers. | | No detection at all | Wrong test point identified | Your PCB revision is different. Search for "CLK" or "DET" pads near the SIM slot. | | IDT/SPFT gives error 2004 / 2005 | Short released too early or too late | Practice the timing. Short, connect USB, wait 3 seconds, release. | | Phone gets hot quickly | Short to the wrong pin | Immediately disconnect USB and battery. Re-identify the correct test point. |