Discrete=Separate(=Modular ?) The advantage being that a single small board could be replaced rather than the whole motherboard.
I trust that the work you've already had done was under warranty and -- even if out of warranty -- you are entitled to look to the retailer for help.
that is the same problem with my laptop same model of acer. please somebody out there tell me where can i buy that power circuit, i am here in jubail, and i gone to different shops here in jubail center but i can not find