I have an old Acer Aspire m3100 desktop and the case to it is broken, I have another case for it but I do not have the installation manual to show me how to reconnect all of the connections from this other case. How can I get or find the diagram showing how to make all connections to this motherboard. I'm trying to restore this computer for my grandson? any help would be appreciated, I've tried contacting Acer but they won't help unless the computer is under warranty and their third-party support doesn't do hardware issues?? I also downloaded a manual from online but it doesn't show the right info.