I have a set of recessed CFL (4-pin) lights and a few of the ballasts are failing (CFLs fail to start randomly, even after replacing them with new sets).

They are [NHPSIC-626ELAT, CFL (4-pin) fixtures](http://www.noralighting.com/Product.aspx?&pid=9605).

![enter image description here](https://i.stack.imgur.com/zMn46.jpg)

Is there a way to get to the ballast without going through the attic (there is no access in my house)? 
I am thinking about replacing the CFLs with LED retrofits, but either way I have to either replace the ballast or bypass it.