Laptop makes a popping sound then loses power

I have a HP G70-467CL with win7 pro 64bit.
Lately I hear a slight pop and the laptop loses power, but reboots immediately.
It's as if it has a circuit-breaker that resets automatically.

Any ideas on how to troubleshoot this problem??

 

There's nothing different between a pc, and a laptop other than some parts
being soldered in order compress them in a smaller space.

First thoughts is to check the power jack connector,where the power cord fits
into the laptop.

The other thing could be it's over heating,this would cause it to switch off then on again.
Check the vents for fluff, use a garage air line to clear the vents.

The fan could become fouled of broken check this.

I don't think it's the hard drive it would not restart without throwing up problems.

It could be a loose component.

 

Thanks for the info "something back"
I actually took the laptop to a local tech and he did clean out all the dust, apply new "heat transfer" paste.
The fan's okay.
Actually after three shutdowns early this morning, the damn thing hasn't "burped" since.
Guess I'll have to wait and see if it will go out again.

Thanks