He only has one DIMM that is Corsair XMS and has shown (that I know of) no signs of damage; it was bought brand new.
I'm aware that some (or all? I've never seen one post without RAM) computers refuse to post without RAM, but the point of this mention, was to ascertain any beep codes, but since he told me that he received no beeps, even without the RAM, it's not a great sign.
BTW, Joe: no need to bracket "Memory" lol; it's redundant, like saying HDD drive.
Besides, there's only one kind of memory, broadly speaking.
Once again, cheers for your posts! [: He's visiting his sister, ATM, and she has his old PC, and so he's probably going to get some bits and pieces to try on the problem rig.
I am worried that it could be an ESD situation, or perhaps some sort of electrical damage involving either the 4-pin cable or his case. He mentioned something else to me, yesterday evening: he said that when he checked to see if his GPU was seated firmly (by pushing down a bit) the motherboard or something (not quite sure what exactly) touched the case, and he says the power cut out. I told him to maybe try setting the rig up externally, which he tried, again to no avail. :|