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Satellite A75 Power Off when booting

post #1 of 7
8/3/10 at 11:08am
Thread Starter 
I have a Satellite A75-S213 laptop that was overheating then shutting down abruptly.

I have disassembled it and cleaned out the wall of dust that had formed near the heatsink.
As a result I notice that the laptop does NOT overheat anymore.

Yet, the problem regarding the shutdown still exists.

When the system starts up and begins booting into Windows, it shuts off.
I have tried booting the system with an Ubuntu Live CD, the same thing happens - it shuts off when Ubuntu is booting.

I have also started the system with a diagnostic CD. I ran a stress test on the system and it does NOT shutdown at all during the test. The stress test finished and I try to boot into Windows, it shuts down.

I checked whether there is actually a problem with the fans at the bottom, but these both spin quite OK.

This is wierd!..


Any assistance would be appreciated.
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post #2 of 7
8/3/10 at 1:33pm
Have you tried with Safe Mode?

cheers ...
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post #3 of 7
8/3/10 at 2:30pm
When you cleaned out the "wall of dust", did you give the CPU a new coating of Arctic Silver 5 or other thermal paste????
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post #4 of 7
8/3/10 at 3:05pm
If it shuts down like that, usually the GPU is at fault, esp if it does it with Ubuntu as well as windows..... Try it in 'Safe Mode', also try puppy linux ..... It runs a different way of setting screen resolutions and may work for you...
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post #5 of 7
8/3/10 at 8:20pm
Thread Starter 
I tried booting the system in Safe Mode, even with Command Line, but it shuts off.

When I cleaned out the dirt from the heatsink I did not remove or re-apply any thermal grease. Note that the system does not overheat, it runs at normal temperature.

I did suspect that there was a problem with the GPU, it seems that anything that requires use of GPU causes the system to shutdown. I did try the puppy linux, that too failed during boot when the desktop is to appear.

Could it be that the previous overheating problem may have damaged the chipset, etc?

Is there a utility that can thoroughly test the graphics chipset/GPU, etc?
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post #6 of 7
8/4/10 at 7:34am
I would keep my eye open for a A70/A75 parts machine out there. Possibly one with a broken LCD....you could then either keep the bottom section of the new machine and swap your LCD (not a big job) and use your RAM and HDD (they usually remove these)..then you are back in business..I had to go the other way as my bottom section was good but the lcd failed...not a big job..and didnt spend a lot either..just had to keep watching...there are those who want an arm and a leg for their stuff and especially for shipping..(Ebay) or check out your local Craigslist and Kijiji
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post #7 of 7
8/4/10 at 5:24pm
Thread Starter 
I sorta confirmed the suggestion regarding the GPU. I downloaded a CRUX Linux live CD http://crux.nu and it booted and worked fine on the laptop for a long period of time. CRUX is a command line version of Linux.

Whenever I try to run Ubuntu/Windows, or anything that uses GPU video it shuts off.

I now know what needs to be done .....

Thanks all for your comments, much appreciated!
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