If your LG K41S still vibrates or shows a battery icon, you may not need ISP. The phone can enter EDL mode (BootROM) via test points:
However, for hard-bricked devices (no USB detection at all), ISP is the only solution. lg k41s isp pinout
Below is the exact pinout based on reverse-engineering of the PCB. All coordinates are relative to the eMMC chip (U401 – Samsung KLM8G1GETF-B041). If your LG K41S still vibrates or shows
Once detected, you can perform the following critical repairs: However, for hard-bricked devices (no USB detection at
| Issue | Likely Cause | Fix | | :--- | :--- | :--- | | No eMMC ID | CLK line not connected or shorted | Re-solder CLK point. Check for solder bridges. | | CRC Error | DAT0 wire too long or poor GND | Keep ISP wires under 10cm (4 inches). Use thicker GND. | | Busy / Timeout | CPU interfering | Disconnect the main battery. Hold the phone's Volume Down/Up button during ISP initialization to keep CPU in reset. | | Write fails | Power instability | Add a 47uF capacitor between BAT+ and GND near the connector. |