The LCR-T7 microcontroller is typically a surface-mount chip (ATmega324PA or ATmega644). You will need a way to connect to the programming pins without soldering, or you must solder thin wires directly to the programming pads on the PCB.
To understand the firmware situation, you must understand the hardware. The LCR-T7 is built around an or ATmega644 microcontroller. It runs a port of the open-source AVR Transistortester project (originally developed by Markus Reschke and Karl-Heinz Kübbeler).
AVRDUDE (Windows/Linux/Mac) or Avrdudess (Windows GUI).
Stock firmware often misidentifies complex or damaged parts. The updated firmware accurately measures: