Device Identification
Model: Xiaomi Mi A1 Codename: tissot Processor: Qualcomm Snapdragon 625
What is the Test Point? The test point (often called "EDL Point") is a hardware shortcut. By shorting this point to the ground (metal shield), you force the Qualcomm processor to boot into Emergency Download Mode (EDL Mode, usually port 9008 ) . This is typically used when the phone is hard-bricked (dead), stuck in a bootloop, or the bootloader is locked and cannot be accessed via Fastboot.
Step-by-Step Guide 1. Disassembly You must open the back cover of the device to access the mainboard. mi a0101 test point new
Tools Needed: Heat gun or hair dryer (to soften glue), suction cup, plastic pry tool/opening pick, and a pair of tweezers. Process:
Power off the phone completely. Heat the back glass/plastic panel to soften the adhesive. Use the suction cup to create a gap and insert the pick. Work your way around the edges to release the clips and glue. Gently lift the back cover (be careful of the fingerprint sensor ribbon cable on the back cover; disconnect it from the motherboard if necessary).
2. Locating the Test Point Once the back cover is removed, look at the motherboard. Device Identification Model: Xiaomi Mi A1 Codename: tissot
Location: The test point is usually located on the lower part of the mainboard, near the SIM card slot connector or the battery connector area. Visual Identification: Look for a small, exposed copper pad on the PCB. It is often labeled or located adjacent to a metal shield can.
Specific Detail for Mi A1: It is typically found on the bottom half of the motherboard . You may need to remove a small metal shield (protective cage) covering the SIM/SD card slot area to see it clearly, though sometimes it is visible without removing the shield. It is usually a single gold/copper dot separated from others.
3. Shorting the Point
Connect one end of a USB cable to your computer (do not connect to the phone yet). Use metal tweezers or a thin wire to short the test point pad to the ground . The ground is usually the metal shield surrounding the component. While holding the short (contact between the point and ground), plug the USB cable into the phone. If successful, the phone screen will remain black, but the computer will make a "device connected" sound. Check Device Manager on Windows. It should show Qualcomm HS-USB QDLoader 9008 under "Ports (COM & LPT)".
4. Flashing Once in EDL mode, you can use tools like Mi Flash Tool or QPST to flash the stock firmware (MIUI or Android One) to unbrick the device.