IC3 is the 78L05 power regulator. If you measure 6V on the output leg (the leg nearest to the power connector) then there is something wrong. I would double check all the components in that area for correct placement (C3, C5, IC3, X1)
If everything is placed correct and you say you have seen magic sparkles, then you probably short circuited something. My recommendation is to replace the 78L05.