You haven’t given us much information to work with. To properly assist you, we need photos and voltages of all IC and transistor components.
However, if I understand what you have said, you have power applied. You have a blinking LED that indicates that the LFO is working. You do not hear your guitar signal in both bypass or effect setting of the foot switch.
I would double check that you are getting signal from your guitar to the input jack, through the foot switch. The foot switch wiring could be incorrect. The output wiring to the out jack could be faulty as well.
You might need an audio probe to further trace the signal through the circuit. Report your findings.