: Ensure the battery is completely disconnected before shorting the pin. If the battery supplies active current, the SoC may try to execute a standard boot instead of a hardware trap.
: The standard utility for flashing Fastboot ROMs.
The Complete Guide to JMM-AL10 Test Point Updates for Honor 6C Pro / V9 Play jmmal10 test point upd
: If the hardware keys are broken or the preloader is deeply corrupted, a physical short on the logic board is mandatory to force a connection. Step-by-Step JMM-AL10 Hardware Disassembly
Ensure the device is powered off with the battery connected (or disconnected based on your specific software version instructions). : Ensure the battery is completely disconnected before
The exact location of the test points on the JMM‑AL10 motherboard is not universally documented in public sources because manufacturers generally do not publish board schematics. However, generic MediaTek test‑point procedures are widely understood, and the specific pads can sometimes be found by searching repair forums or video platforms for “Honor V9 Play test point location.” Because the exact location is not provided here, you must perform your own research using the device’s board revision number, which is typically printed on the PCB.
Use metal tweezers to short (bridge) the to a ground (any metal shielding or ground point on the board). The Complete Guide to JMM-AL10 Test Point Updates
If the software fails to communicate using the buttons, transition to the physical outlined above.
This article dives deep into what the JMMAL10 test point is, why the "UPD" (Update/Programming) procedure is necessary, and a step-by-step guide on how to perform it correctly.
Open your chosen MTK service tool and navigate to the universal MediaTek processing tab.