I have agreed to look at a friend's computer to diagnose why it won't power on. The CPU isn't posting (no beep.) I have removed all components besides PSU, HSF, and CPU. Now I get a beep (one sec) and then a long beep (3 sec.) Repeating. So I installed a stick of RAM and now get no beeps. I've tried booting with each of the sticks in each slots and nothing changes.
Apparently the computer was working fine. They restarted it and then this happened.
Before trying this everything seemed to be getting power. And I have read through the "No POST", "system won't boot", and "no video output" checklist.