Minimum hardware to boot E6400 to BIOS?

Bought a used stripped headless E6400, and am trying to test it to BIOS, to get the version number. The power button works, the middle (caps lock) and right (numlock?) lights power up, the left (numeric?) light blinks for a while, then comes on and stays on. Nothing is going to video (the PA-12 and monitor are used daily), there's no beeps occuring, and that's after playing with FN-F7. We have (at least) a D430, D600 and D620 lying around being used as headless laptops going to an external monitor, yet this is the first attempt at a headless E-series laptop. A little short on parts lying around, so the question came up...

What is the minimum parts required to boot an E6400 to bios?

The unit has no ram, cpu, cpu heatsink or fan, lcd screen, hard drive, or optical drive. The only parts I can find that would not be part of the base/motherboard are the keyboard, and wlan and bluetooth chips.

Anyone? Thoughts? Thanks!

 

You should only need the CPU and RAM to power it up (obviously you should only run it briefly without the heatsink); if that doesn't do it you probably have a bad board.

 

Finally got a chance to test this. 1gb of ram and no cpu did nothing. Adding a P8400 got the computer to boot into bios. Didn't test cpu with no ram. Makes sense that you need a cpu and ram to get to bios (at least with an Intel laptop). Heatsink/fan should arrive today, then we can play with this past bios. Thanks!