Moog Sub 37 Repair Tear Down

Fixing a button and an LED with signs of liquid damage on the PCB. The damage was causing preset 2 to be unable to be selected. I tried replacing the 74hc165 and the resistor network and giving it a good scrub with isopropyl solution and a toothbrush but no luck. It was an intermittent fault and tricky to pin down. I was reluctant to replace the delicate button as it seemed to work, but I had a lucky find with a replacement button salvaged from a Raspberry Pi Pico. I used a 3mm THT yellow LED to replace the wonky SMD one and it solved the problem!

Now the only problem is that I want a Moog Sub 37! :D This thing sounds amazing!