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Dead motherboard My presario F500EA went dead after my niece left it operating on the bed for a day. I suspect it overheated due to blocked vents. External power supply is ok. HDD is ok. I suspect motherboard is shorted. Please help me troubleshoot the motherboard. I know how to use multimeters but I dont know where to start. I dont have a schematic diagram of my motherboard. please give me tips on how to tackle this problem. Thanks so much.

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  • Mike Peluso
    Mike Peluso May 11, 2010

    I did search, many hours & could not find any type of schematic's or diagram posted on the web for the F500EA board. Only a couple places to send for repair.

  • Mike Peluso
    Mike Peluso May 11, 2010

    Unable to find any schematics or diagrams for this notebook.


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Bad news - an overheated F500 is a really expensive paperweight. All you can really do is try and source a new motherboard and hope the CPU and RAM didn't go the way the board did...

Posted on Jul 21, 2009

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When the power button blinks do you hear the laptop fans run on full speed? If that happens its because your laptop is overheating and is trying to cool down. It will not turn on until it cools down to protect from damage due to heat.

Use your laptop on a hard surface and dont block its vents with anything. If you want to use it on bed keep it on a laptop cooler or a thick book to allow ventilation.

If laptop doesnt turn on at all, the motherboard might be damaged. Take it to repair shop and check whats wrong.

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Hi. Thanks for your question.
My first guess would be that your laptop is overheating. To confirm this you could download program called speedfan using this link please click donwload and once downloaded install on your computer.
Once you have this program you can monitor your computers temperatures and see if they're rising before laptop shuts down.
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For a properly designed laptop, the most common cause of overheating is blocked air vents. When dust blocks the fans and air vents designed to cool your laptop, overheating results. (In some cases, blocked vents and poor design are related, as some designs are excessively prone to becoming clogged with dust).
Software Causes of Laptop Overheating
In other cases, laptops overheat because the software designed to protect the laptop – specifically by controlling the operation of cooling fans – does not work properly. In some cases, this is due to problems in the computer’s BIOS, and can be cured by upgrading to the most recent BIOS. In other cases, upgrading or changing the computer’s operating system can cause this software to not function.
If, for example, you have upgraded from Windows ME to Windows XP, the system software designed to operate the fans may no longer work properly. (What’s worse, the laptop manufacturer may refuse to provide support in this instance, on the grounds that you changed the operating system and so are no longer operating the system as it was designed to operate.) In other cases, replacing Windows with Linux has led to this problem if the proper Linux utilities to control laptop cooling were not installed.
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In a distressing number of cases, laptop overheating results from poor design by the notebook manufacturers. Some manufacturers cram desktop CPUs into laptop configurations, and do not adequately provide for releasing the heat that these desktop CPUs create. Others simply have failed to provide ventilation and cooling systems appropriate for today’s CPU and video chips, which hold many more transistors than in the past and so generate more heat.
Several class actions have been filed against laptop manufacturers due to overheating laptops, including Toshiba and Dell. Previous class actions have led to settlements under which compensation was awarded to owners of overheating laptops who ran up repair bills trying to get the problem fixed. More class actions related to overheating laptop and notebook computers are reportedly under consideration.check here for more information

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