Freezes\stops at the bios start up screen...

hi, there is a common fault on this model, to do with a bga chip (ball grid array) just underneath the touchpad. try appling a small a mount of pressure with 2 fingers just above the touchpad on the plastic between the keyboard and touchpad while it is booting . if you get any further response from the laptop then this is your problem. i have this model and same problem occurred i took the unit apart and placed a rubber wedge ontop of the intel BGA chip. put it back together and with the pressure applied from screwing the case back together hey presto works fine. hope this helps.
by the way please dont attempt to open the laptop unless you are confident you can put it back together :-)

Thanks a lot to the guy with Solution 1. Amazing! I just pressed the frame above the touchpad and it run like breeze :)
I could have been pondering for 3 years without ever such a thing cross my mind!

This worked for me after trying several other things. Thanks so much.

Great job it worked as you said