Laptop bombs out

I have a hp pavilion dv1000 and it fell the other day, and since then every time i switch it on it dies right afterwards, goes completely off. But on some occasions it load up windows and can maintain about 5 min on, then bombs out.
I have changed the memory, the hard drive, cleaned everything inside, changed battery.
Have you guys got any solution I could try?
Answer #1
When it fell did it jar the fan, if so the heat from a start up could cause a shut down, or running 5 mins well the heat builds up, check and make sure the fan blades are free and moving, all so you can try this turn off you laptop and take out the battery, now push the start up button 2-3 times to remove any charge in the system, now just go around and make sure all conections are pushed in 1 may have came loose and you have an intermitant conection, then try to restart it crossing your fingers
Answer #2
without booting, when you plug the charger in the charging light stays on ?
Answer #3
, i’m going to open the laptop tomorrow again.
, yes the charging battery comes on.
Answer #4
yes the charging battery comes on.
so it duz not seem to be a bad power socket connection
i'm going to open the laptop tomorrow again.
yup, looks like you have to dig a lil deeper
you try re-seating the CPU ?
Answer #5
yup, looks like you have to dig a lil deeper you try re-seating the CPU ?
Thats one I didnt think of your right just a knock the wrong way and its not making the right conection, Good Tip
Answer #6
I have to open the laptop to re-seat it right? or must I do something in the BIOS?
Answer #7
I have to open the laptop to re-seat it right
yup
and remove the fan/heatsink assembly you may need thermal paste as well, to replace what’s between the fan/heatsink and the CPU