wrong sound and solenoids is likely a momentary solenoid data problem. I'd suspect MPU J4 if both sound and solenoids have problems. Also driver J4 and sound J1. In the schematics check the signals labeled SOL-A to SOL-D (and SOL-E for the sound board comes from MPU J1 P7).
Quoted from dothedoo:Yes, that won’t fix your sound or flipper woes, but should fix your solenoids.
Sound board uses most of the same signals as the solenoid driver board so very likely mpu j4 connector could be causing both issues.