i've opened it once. not easy to open though. That's my first time exposing myself to the laptop interior n my first hands on for laptop (though i've opened my desktop n cpu heatsink etc countless of times) n it's more delicate to handle. There are MANY screws on this particular laptop, n you have to be VERY careful on the ribbon port for keyboard, subwoofer, n trackpad. Some of the ribbon locker use the push to lock/unlock n some use the flip method to lock/unlock. Due to my first time noobness i broke 1 of the ribbon locker n have to use small bits of paper to hold my trackpad ribbon in place. Haha all is fine when i perform my 2nd disassembly on my friend's laptop cuz experience before de lol. How to post up photos over here? Not the links thou, but to display photos here. I have an album i took when i was disassembling.

btw mine's n45. Not sure how different is it from n55 but suppose to be almost same? Hmmm