Ops! Rushed post! There would be no voltages otherwise!
The voltage on pin 9 of the M51134 seems correct but those on pins 8 of IC1 and 2 are way too low.
Have you tried reflowing the solder? Change the 5532s? Run a knife between all the rows? If you've already done that, can you try to jump the 100R resistor going from D1 to IC1 pin 8?