As I explained above (in the admittedly long thread), I had the same issue with my MBP, but was able (instructions above) to establish what version of the firmware I needed (it was the previous model's, in my case) & flash that to fix the problem.
As I explained above (in the admittedly long thread), I had the same issue with my MBP, but was able (instructions above) to establish what version of the firmware I needed (it was the previous model's, in my case) & flash that to fix the problem.