Lg K52 Test Point -
Before resorting to hardware, try these software-based combos:
Only when these fail should you proceed to the test point.
The LG K52 is powered by the MediaTek Helio P22 (MT6762) – Correction: Some variants use Qualcomm, but the main K52 uses MediaTek. However, the test point principle applies to both. For MediaTek, the equivalent is "BROM Mode" or "Preloader Mode". Most documentation refers to the "LG K52 test point" for Qualcomm EDL mode, but if your device uses MediaTek, the test point forces BROM mode. Always verify your model number (LM-K520).
| 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. |
While maintaining the short:
What to expect:
