Lg K52 Test Point -

: Short this specific point to the ground (any metal shield on the board) using a pair of tweezers while connecting the USB cable to your PC.

: Use a heat gun or hair dryer to loosen the adhesive. lg k52 test point

LG K52 (LM-K520) uses a MediaTek chipset, which typically allows you to enter Boot ROM (BROM) mode : Short this specific point to the ground