Hey friends,
I've got a laptop CQ40 with CAPS & NUM LOCK 4 times blinking. HP LED codes shows it is a graphic controller problem. This mother board is UMA and no separate graphic chip. So I reballed South Bridge and the North Bridge but nothing happened. What else do i need to look up? Thanks

my experience 4 times blinking is RAM problem.
clean the slot and pins of RAM would solve the problem.

Actually I cleaned the RAM slot and reball the North bridge. But it still showing 4 times blinks. Also customer asked to return the laptop. Thanks for the help.