HI,
I had an L6 with display that lit up blue only and the rest of the phone worked fine. i changed the lcd from a L2 (the L6 without a camera), and the damaged lcd started working in the L2, and the L2's lcd worked in the L6... odd, but my problem was fixed. By the way, i checked and rechecked the flex cable connections and everything - they were fine when i had the non-working lcd inside the L6.
thanks!