Got better understanding with time. The exact reason of the error is A3 board initialization delay when cold. The 4 didoes on board are blinking all the time, means that board is not doing any internal tests. A2 boards expect immediate response but A3 is not initialized thus error appears. Once it heats up for 30 seconds, the initialization is immediate. I tried to heat up device without faulty board inserted but it is not helping, this means that A3 board need to be hot itself.
Also tried to heat with hot air gun ROM, CPU and ASIC ICs, but it is not helping. Still, the board needs to be inserted and heated up in the 4145A itself.