Question Thermal paste and shutdown

[rubinho]

Hi!

just replaced my dell precision 5510 laptop's motherboard with a new one because it was said to be malfunctions by the dell lab here.

the new one started off great, but after a while (about two hours of installations and updates) it showed a blue screen of windows, said there was a problem and restarted the computer. i re-installed windows and after ten minutes or so, the fans started working really fast and loud and the computer shut down.
i restarted the computer and when it reached the windows password screen it shutdown again (same way with the fans..)

when i replaced the motherboard, i used the remaining thermal paste was on the cooling strips.

could it be that the CPU it overheating in a second and turn off?

the previous motherboard did the same and they said it was dead, could it be something else?

now the laptop works but after a while it shutdown again..

please help!
what do you suggest i need to do?

thank you!

 

[rubinho]

update,

just started the computer and quickly started a temp software,
the cores temp started rising 40-41...50..55...59...fans and shutdown!
so it is definitely the cooling of the processor.

now will the thermal paste be enough?
do i need something else?

 

[NightHawkRMX]

Don't reuse thermal paste. Invest in a new tube of thermal paste for like $7 and this should help.
Put a pea sized dot of thermal paste on the cpu and make sure the cooler is mounted on the cpu securely.