@poshgeordie: Yes, it turns off immediately when I push the power button on a failed start up. However, if the computer freezes while it's already on and Windows was happily running, then there's the normal delay (4 seconds?) before it turns off. Who would you recommend in the US to reflow the SB?
Based on what you're saying here - if it turns off immediately then it's usually the SB.
If the PC freezes when on, and there's a 4 sec delay, then that could well be the GPU.
It's very hard to say 100% that's it's going to be either one or the other, and any decent reflowing company should be able to reflow the SB, test the result and then reflow the GPU if on switch on there's no picture and the laptop takes around 4 secs to switch off again.
Maybe these places expect the average user to suddenly become instant experts on what's wrong with their laptop...
Here we prefer people to send the laptop in saying it's faulty, it does such and such. We then test it and reflow / reball the relevant chip which presents the fault. We then retest and if necessary do whatever's needed next if anything.
I suppose the difference is we don't charge $35 or whatever for a reflow....
I feel that the more I say, the more I'm confusing you - apologies for that!