The exact position of the test points can vary slightly between variants (LM-K520EM, LM-K520HM, etc.). However, based on hardware schematics and repair forums, the primary test point for EDL mode is usually located near the SIM card reader or the processor shield.
: The pins are tiny. Slipping with tweezers can damage surrounding resistors or capacitors. lg k52 test point
| Problem | Likely Cause | Solution | |---------|--------------|----------| | No COM port appears | Wrong test point or bad short | Clean the test point with alcohol. Use a sharper tweezer. | | Device Manager shows “QHSUSB_BULK” | Drivers not installed | Manually install Qualcomm QDLoader drivers. Disable driver signature enforcement. | | Connection drops immediately | Short released too early or battery interference | Keep the short for 4–5 seconds. Remove the battery entirely (if removable) or disconnect it. | | SP Flash Tool error “S_BROM_CMD_STARTCMD_FAIL” | Not in BROM mode correctly | Re-short while clicking “Download” in the tool. | The exact position of the test points can