Firstly, thanks for the reply.
As far as identifying the problem goes, some engineer person checked up the computer and said that the problem is with the motherboard. I didn't bother checking anything else. The computer was in perfect working condition; it hadn't been used in a while and then suddenly stopped working.
I did some extra research on the mother. It is a ECS PS62-ML Slot A motherboard. It now makes sense why such boards would be expensive, i'd thought that since they're old, people would sell them cheaply :\
I fancied bring back this computer from the grave to use as a dummy, test things out and such. Budget wise, I have all I need apart from (what has been said to me) a malfunctioning motherboard.
The the computer it powered, all that comes up it a black screen. Nothing more, nothing less. :?