Did you try it with 2 good short cables (10ft or less) with only a guitar and no other pedals plugged in?
That way you can rule out several common issues right away. Remember we sold thousands of these worldwide over 10 years so there is no real good reason why one circuit would be different than the rest. The other thing I would do is a solid re-flow as part of a standard troubleshoot.
Other than that start a new thread with photos and voltages so we can have a look and we will be happy to try and help.