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Toshiba A75 Won't Start.....


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#1 j32475

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Posted 19 August 2008 - 05:30 PM

Hi everyone,

My wife and I purchased identical toshiba a75 laptops about 3 yrs ago, last week hers decided to "stop starting".... when pressing the power button sometimes it will turn on and start to boot for anywhere from 2 seconds to 15 or so seconds then just shut off. I'm aware of the power jack problems, so I took it apart and did the power jack replacement, ..... still the same problem. because I have two identical laptops I was able to swap the memory and processor,.... still the same problem. I believe it is something on the motherboard because I physically have the motherboard out, no modem card, no wifi card, I hook up the battery and..... yup same thing, it will start only for a few seconds as stated above. has anyone seen this before or possibly have a idea of what could be wrong? I know there is additional ram on the board, could this be the problem? I'm really at a loss on how to further identify the problem, any help or ideas would be greatly appreciated.

thanks,

joe

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#2 dc3

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Posted 20 August 2008 - 01:43 AM

Hi j32475, and welcome to BleepingComputer.

This could be a overheating issue, take a can of air and blow out the dust from inside the laptop.

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#3 j32475

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Posted 20 August 2008 - 05:09 AM

Hi Dc3,

Thanks for the welcome (and reply), I did find a lot of "stuff" in the heat sink when I took it apart, at this point the heat sink is clean and mounted (with fans), the unit still refuses to start (for more than a few seconds) with just the mother board and battery on the workbench, just the same as before dis assembly. I thinking it may be time for a new motherboard....

thanks,

#4 garmanma

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Posted 20 August 2008 - 10:44 AM

You've pretty much eliminated everything else. You did replace the thermal compound when you had the CPU out, Correct?
Mark
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#5 j32475

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Posted 20 August 2008 - 05:35 PM

Hi garmanma,

yes i did use thermal grease, it was the white stuff, not the gray stuff (which i prefer)

thanks,

joe




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