Hp compaq nx9010 recommended heat sink compound to be used

ma laptop formally had a problem of switching it self off, after some time(a month) it went off, i switched it back on as i used to do en hunged while starting up, i thought i was a heating poblem, i oopened it up en cleaned the heat sink, en applied da heat sink compound, connected back all the connections en closed it, but as i speak now it has refused to boot, so silent en no indicators ar lighting, wat kud be the problem

Motherboard, power plug, power supply, battery. Power Supply is the cheapest to test and replace. Try turning it on without the battery, then try a new power supply.