Yes, LFO led is blinking, there is connection between pin35 and R36.
However, there is no connection between PIN39 and R134 but there are connection between both PIN5 and PIN6, and R134.
Should I manually add a connection between PIN39 and R134?
PINs 5 and 6 are connected to +5V and R134 is, too. So this is correct. the other end of R134 should be connected to PIN39.
If it is not, yes try and make the connection yourself. However I suggest you post a photo of the soldering side of the installed mod first.