【Remote Control Malfunction】 VICTAS Spin Mate V Table Tennis Machine

This is a Victas Spinmate V table tennis machine.

Accessories:
Main unit
AC cable
Power adapter
Remote control (malfunctioning)
Instruction manual

Purchased about 2 years ago and used for about 1 year.
It was not used very frequently.
When I tried to use the remote control for a function check, it did not respond.
It did not work even after changing the batteries, so I believe it is malfunctioning.
There are no issues when operating the main unit directly.
Please consider this after understanding the above.