Hello
for a little home project I bought a Latitude E4310 motherboard with integrated CPU and graphcis. I put a heatsink/fan on it, a 2Gb memory module, and daughter board with a VGA port. I've tried to boot this system by 1)plugging a power source and a monitor directly, and 2)docking it with a docking station that has the power and monitor connected to it. In both cases I get the three leds light up and I can see the fan spin for a few seconds. Then, after two or three seconds (monitor is still black), everything shuts down. The CPU area feels warm to touch (but not too hot). Is there any other component needed to boot the system? I won't even get to the DELL logo or the BIOS before it shuts down.
Edit: I forgot to mention that I've tried three different motherboards of the same model and three different RAM modules. All three boards are refurbished, supposedly fully functional, from two different sellers. I think it's unlikely that they are all bad and failing in the same manner.
Thanks!