Ok it is a HP Pavilion DV2000 CTO Notebook, not sure if it is a 2000, 2000t, or 2000z. It is a rather newer model laptop with a lot of bells and whistles. Here is what happens.
I can press the power button and hold all day long and nothing happens well almost nothing happens all the leds around the keyboard and such turn on like the power is being applied. I can press and release all day long and nothing happens well same as above. To get this unit to power up (mind you not a power up password cause nothing even displays on screen) I must press the power on button once wait a second, then press it again like turning it off wait a second, then press it two times in quick succession. This all has to be completed while it is plugged into the AC adapter. When it is not connected I cannot get unit to power up at all but the led's do come on, does not matter power button sequence. Not sure but might be a different power button sequence. I have been able to power up and applied Windows XP S3 along ith latest help application from HP. But when the machine requires a reboot I have to shut it down then repeat the sequence again the machine will not restart by itself.
I contacted the live chat at HP but they were almost useless as they did not under the question.
Been working with laptops a long time but like most of you have said this is a new one. I do remember so features for desktops where they could be blocked but was with I think something like a hardware switch or something. Pulling what little hair I have out.
Thanks folks.