Reprogramming damaged MK-328 component tester (EZM Electronics Studio)

Thread Starter


Joined Oct 19, 2013
While measuring a mains capacitor in haste, I forgot to discharge it first and ended up damaging my component tester!

Before anyone says it, yes I know I should have discharged the capacitor first!

Anyway, I have replaced the ATMega328P microcontroller but I can't seem to find a firmware version that works? I have tried so many but nothing appears on the screen.

I have checked the regulator output voltage which appears once the button is pressed, which indicates that the firmware is running.

Photos of the tester are attached. I believe the LCD module is a 12864 soldered directly onto the PCB.