OK after many repairs it left the sound problem.Please watch these two videos
On first video the music,the sound effects are something incorrect-music sometimes suddenly stop,sometime is ok.When it's ok,after pressing some of the switches work,but after 3 or 4 switches begin to go incorrect

On second video when I press some of the two flipper buttons scores points and again I can here some strange sounds

I think is some of the ROM on the sound board,CPU ot the PIAs,but what can it be?
I clean the ROMs pins
Board have some cold points
Reflowed the connectors
Changed the CPU socket(but not the CPU)

Changed the CPU and the two PIAs on the sound board-still the same
I begin to think that the problem is in the MPU board

Problem with the scoring is fixed,now I see the repair info

I think as you about the IC7 and IC12.I will replace them and will see what will happen