I know of two places in Shah Alam.
1. Alam Sentral Mall -> Its on the same floor as Hot Market, when you come up from the escalator you'll see it at your 8 o'clock.
2. Shah Alam Mall -> Entering from the front door, go to the central foyer, got escalators going 1 floor down, you'll see a computer shop there. I think they call themselves Computer Junkyard.