I am a freelancer in technical support for desktops and laptops, but this is only with software and a very basic idea about hardware, bcoz most companies would replace the hardware if it had gone bad, now all what i need is, is there any site which clearly explains the different parts of the motherboard and how to troubleshoot if any issue arises. BTW i know what a RAM slot, Processor slot and PCI, PCI-E slot means, i want to know about the core voltage pins and the ATX pins and the ways to resolve the issue, if there is a problem with these areas. Moreover pls. do not give any reference links to wikipedia if u think i can learn something abt. ATX, bcoz i already did and it didnt help me in troubleshooting.