The yellow/amber light means no video signal present, so like me, you're not getting any output from the video card. I'm thinking at this stage that either my CPU or RAM are the culprits, but neither are a cheap buy just for the sake of a swap out. Since this mobo was to replace one in another dead PC which seems to behave in a similar fashion, and the only component common to both is the RAM, then I'm zeroing in on that component. I'm seeing if I can borrow a known good stick from a tech friend just to determine this and know if I need to spend on RAM or not.