: Use a pair of metal tweezers to touch both pins simultaneously.

A test point, also known as a diagnostic mode or engineering mode, is a special feature built into smartphones that allows developers and testers to access advanced settings and perform various tests on the device. The test point is usually hidden from users, but it can be accessed using a specific code or combination of buttons.

If you have successfully entered BROM mode using the test point, do not attempt to flash the entire firmware from an unknown source. Instead, flash only the preloader and lk (bootloader) partitions first. This often revives download mode, allowing you to use the official LGUP tool afterward.