alex26 Hi, I think the problem is the EC. It has a different firmware. You should try checking with a multimeter if all the keypad pins are connected to the EC. It may have been soldered incorrectly.
I've never worked with SVOD before, but I think it's very similar to the RT809F or any I2C programmer. Always remember to power the chip directly with 3V, and check the pins carefully. There are many, so there's always a chance of a soldering error.
P.S.: Sorry for the delay, this isn't the same email I use every day.