I will be replacing the replacement, due to a fall (cracked screen) and already changed the video cable when I upgraded the screen for full hd, but I'd like to make sure how many pins (30? 40?) and, if possible, brand recommendations, please.
The only sure thing is an exact replacement. Next best is to buy a screen known to have shipped with the same model system you have.
Notebook LCDs are not as standardized as other PC parts - you can easily find variances within the same model line where one system will take a specific screen and another will not.