got my mac fixed a while back after the screen futzed up and the KB backlighting went a bit wierd after 3 months and numerous trips they managed to fix the screen but not the KB backlight. what theyd done is replace the KB, but i dont think the KB assembly comes with the back light bit. not sure tho. anyway i asked them to take another look and when i got it back it still wasnt fixed and they'd managed to scratch my MBP lid and get biro all over it. so again they had a look, this time no scratches, new KB but the backlighting doesnt work at all now. now as it'd be 3 months, i just kept my mouth shut coz a) theyd had it three months already and b) i needed to go back to uni in 4 days. (seems my machine has had 2 chassis changes...1st to replace the one they obviously damaged when fixing the screen and the 2nd to make up for the scratches) now, i have had a look inside my machine, using the ifixit guides..... it seems my back light is there and is connected. its just not working. any ideas why this might be?