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Posted by Fixer on May 19, 2008, 11:22 am
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>
>> Has anyone come across this problem with the Aspire 5102 please? Nothing
>> works, no mouse, no keyboard either on POST or in Windows. Neither
>> internal nor USB. It goes into Windows, loads drivers and programs
>> (unbelievably slowly) but does nothing else and has to be closed off
>> with the power button to do anything.
>>
>> We are at the moment just trying to take the CMOS battery out for a few
>> seconds to see if something in the BIOS has become corrupted but wondered
>> if anyone had come across this problem before with this or any similar
>> computer? Is there any other way of resetting the motherboard or
>> flashing the BIOS without a mouse or keyboard? No lights go on at the
>> external keyboard on turn-on so I wondered if this might be a problem
>> before the whole computer even gets to the BIOS stage?
>>
>> Not sure if this is relevant (I cant see how it could be) but the whole
>> computer seemed dead (only charge light and power button) until I
>> re-seated the memory chips and then at least it went into Windows. But
>> nothing else.
>
> This probably won't help much, but I've seen similar on desktop
> motherboards, when an onboard (surface mount) silicon fuse had blown.
> This fuse was there to protect from short circuits in the PS/2 keyboard
> and mouse cables, but also delivered the 5V power to all the USB ports.
> Luckily I managed to locate it (near the keyboard PS/2 socket) and
> simply soldered a bit of wire across it. If it's that, you'll need to
> know
> what such a fuse looks like and test it with a multimeter (should be
> close to zero ohms) and be 100% sure, before risking this kind of fix.
> HTH,
> --
> Rob
>
>
>Chances are it's the power supply, i know this might sound strange due to
>the fact the machine boots, but the PSU does not just deliver the full
>amount of power to the board it splits off into various amounts, the mouse
>and keyboard has a -5v supply. So if you have a generic PSU just connect
>that up and see if it works. Failing that If you have just re installed the
>hard drive and the keyboard and mouse are USB boot the machine into windows
>and give it 5 mins to load the drivers as I have seen this as well this
>on Dell desktops
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