Colonel Phorbin - welcome to the forum!
In the future, please start your own support thread instead of gloming onto someone else's; especially when referring to a different circuit! It helps us keep the lounge clean and helps to separate search results.
Your symptoms could be caused by the LFO not oscillating or it could be a problem in the wet signal path. Before you start worry about op amps and parts, you need to resolder all of your joints. Like Stephen said, you have some iffy-looking ones. About nine times out of ten, problems like this are simply bad solder connections and not bad opamps or transistors. You need to go back over each joint and remelt the solder so that it is nice and shiny. Make sure your iron tip is clean, shiny, and hot. Search for 'Stephen's tips for a successful build' in the DIY Discussion lounge to see how solder joints should look. And when you're finished, make sure and cut each component and wire leading poking through the bottom of the pcb as short as you can.
Yes, you can take some voltage readings to make sure the LFO is oscillating. The easiest way is to get the voltage from pcb pad R2. Set your DMM for DC voltage, clip or touch the black probe to a ground point (like the middle lug of the input jack), place the red probe on R2, and watch the readout. You should have a positive DC voltage reading that moves up and down. You can also take voltage readings at the +9v pad to record your supply voltage, and at pin 7 of each IC to make sure you have supply voltage there.