sorry about the multi posts, also try all the diff ram slots, alos if you havnt got a motherboard speaker you wont hear the beebs, i was in a simular situation a month ago, had to update the bios with a older cpu before my latest one would work, make sure the motherbord supports the cpu form an old bios, if not you may need to update it before it works
Well this system worked almost for a year. I am sure i have speaker, since i got new one from the box yesterday and plugged it in. It doesnt makes a single sound. All power cables are plugged in. RAMs tested - nothing changed.
I am not sure if i got onboard graphics card... i'll have to find out.