What are you suggesting? cleaning out the game slots? yea im really sure that having a dirty game slot screws up your ds. We now have 2 people that have this problem using his code. Why would they add a waiver in the package with the action replay if it couldnt cause damage to the hardware? your idea is obviously flawed. Also, how could it be impossible for it to hack into the hardware if there are 2 or 3 little mini-hacks for pictochat (google it)?
I think that its 100% possible for it to screw up your system and seeing as it DID screw up mine it obviously is possible so unless you have experienced this before and found a solution i suggest you stop ruling out possibilities that you know nothing about.