T30 Motherboard problem..Working strange...

[givtechnicalhelp]

Hey Friends.. I have a strange problem in my T30 laptop..Here is the problem..

It's booting only If I press very hard just near by left Alt key..that is just down side of Alt button. Initially i thought
it is because of RAM slot dry solder.So I applied solder flux and used hot air gun.But still problem not resolved.And almost all components I heated up using blower.If i press very hard everything is working fine.After that if i leave most of the time i will get a scattered color screen and will hang the system.

can anybody help to resolve this strange problem.

[Harryc]

Scattered colors on the screen...remove the keyboard but leave it's ribbon cable connected. Put direct pressure on the GPU chip (has an ATI stamped on it) then power on. See if that makes a difference.

[givtechnicalhelp]

Thank you very much for fast reply.

I tried that still not working.. It seems when I press hard near by upper RAM slot of motherboard & It's booting normally ..And when I move laptop after that will become hang and a scattered color screen
There is a BGA chipset near by ...Almost all components I heated up by blower ..Except BGA chipset and I connected External monitor too ..But same problem..I put 512MB+256MB RAM & I tried with individual RAM too that's 512MB first and then 256MB.In both case giving same problem.That's why I am assuming it's not RAM slot problem.

Now I am placing a 15pound Dumbbell on top of it and posting this reply

[Harryc]

The front memory slot is the one that usually goes bad. Try one stick in the rear slot.

[givtechnicalhelp]

Hey Friends....I think it's not memory slot issue.Because I soldered both memory slot couple of months back and was working fine.And I tried with single memory too it's giving same problem .When I press on the mother board ,("not in the memory slot") it is working normally and once if I remove the pressure or if I move laptop system will freeze and will get a scattered color screen
There is only way to turn on again switch OFF and Switch ON with little pressure on mother board.If I am not applying any pressure on Motherboard even LCD inverter is not turning ON.