Hi beofolks, i have a pair of beolab 9 here. One is on green but without sound - the other sounds, but crackles.   I found an older post in the archive, explaining the exchange of the cpacitors and OPamps.   Could someone please confirm that exchanging the MC33079 Quad OpAmps on PCB1 - the Crossover PCB (inside PCB999 module) will solve the crackling problem?   I would order these (in germany): https://www.reichelt.de/de/de/operationsverstaerker-4-fach-so-14-mc-33079-dg-p108121.html?r=1   And if soemone knows, what to do to make the green light of the other one also make him sound again. Replacing the whole board is super expensive.   Best regards 69er