Dell Processor Thermal-Cooling Assembly

Hello,
after trying to fix an over heating issue i am now haveing an issue with my laptop not wanting to turn on and when it does the fan comes on and the lights blink and it quickly shuts off again

i took out the Processor Thermal-Cooling Assembly and when i put it back in, thats when this problem began

so my question is 1. what could be the problem and 2. what is the Processor Thermal-Cooling Assembly connected to on dell inspiron 1525

any and all help will be greatly appreciated