Problems with the powering up of HP DV2500

[vital01]

I repaired a hp dv2500 had no thermal paste on the cpu so i repaired that. I put it all back together no power, so i tried to break it down to a specific problem. If i don't put the top casing the one that the trackpad is imbedded into it will power on. Once i put the top casing back on with all the screws in. If doesn't power up. Nothing is touching the motherboard. So i am wondering if its not grounded right or something. Im out of options. I have narrowed it down to the top casing. Any suggestions. Thanks.

 

[Ubrales]

Welcome to Tom's Hardware Forums!

You did well on the thermal paste! Check the ON switch for any interference preventing it from fully closing for startup.

 

[vital01]

There's a slit in the aluminum so its not touching anything

 

[vital01]

i dont know still no luck covered the bottom with electrical tape so it wouldnt touch motherboard u tighten one of the screws on the left side towards the power botton shuts off. nothing is touching the board. I have never experienced this problem before. Didn't think it would become such a hassle to put a laptop together and have this sort of issue.