Dell Latitude d531 not powering on

hi all
i took the laptop apart looking for this eeprom chip which i havent found. i waited 24h and reassembled it. then pressed the on button. after, the very first screen came up, loaded a bit and for less then a sec "time and date is not set up" info popped out. then suddenly the laptop powered it self off. when i was pressing the on button nothing happened. the status lights are coming on when i press the on button and that is it.

i did not change the silicone under the heat sink, do u think the processor has something to do with all this?

thanks for helping guys

here's what is going on:
http://www.youtube.com/watch?v=eCzCq-jfdho
 
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