Question about Acer Aspire 5100 Notebook

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USB system is not working

My USB system from my motherboard appears to be not working. I was using the computer and suddenly the internal keyboard, and external mouse stopped working. I've attempted restarting, using the touchpad/external keyboard instead, but it simply does nothing. I've checked the connections for the internal keyboard, but it seems to be connected just fine. I cant even get into Windows to see what is shown about the USB in the device manager as there is no way to get INTO windows without keyboard or mouse access.

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  • tweed_bd Apr 01, 2008

    Yes I have similar probelm. I am not sure what is the main cause behind that and how can I fix it.

  • y2Joesmith Apr 02, 2008

    Hooking up anything including an external mouse/keyboard does absolutely nothing. No lights, no power no connection. I'd love to try updating my BIOS, but it's a tad difficult to do when i cannot tell the computer what to do. I've taken it completely apart, and checked all the connections, and they seem perfectly fine.

    I've found reference to an Acer Service Disk that you can use to run hardware diagnostics with, but I can't find a copy of it anyhere. Does anyone know where i can get a copy of it?

  • arti_005 Feb 01, 2009

    how can you halp me



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Hi Friends,
Acer Aspire 5100 PC Notebook main problem is Connection Problem, Software Problem etc.
For these problem you can visit a link by just Click Here .

For any other problem with this Notebook you can Click Here

Posted on Jul 20, 2010

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Hi, Try removing battery, wait a minute and then refit it. This solved the problem for me. If not, a PCIMIA USB port with external keyboard and mouse may work. This appears to be a known motherboard fault.

Posted on May 07, 2008

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Don't do anything until you do the following

Do you have an external keyboard and mouse that you can hook up to it. If so:

You can run a diagnostic on the computer to see what the problem is. With Dell when you see the logo screen you keep pressing F12, I am not sure what key or keys to press for ACER, they don't have the best website. Do you have a diagnotic disk. If so, run it this will run any diagnostic you want.
Keyboard, mouse, fan, motherboard, etc.

Also, is you Bios up to date.

Are your usb ports working. On a laptop the usb ports are connected to the motherboard. Check the usb ports.

I don't think it is your motherboard if other parts are working.

If you do not have your manual, here is the link

Here is the link for all the downloads for your laptop

I did notice there is a BIOS download; it is BIOS v3.14
Included in this update is your PCMICA card, which has to do with the USB ports (CardBus Controller)
There is an update for the Touch Pad Driver:
Synaptics v8. and Elantech v5.0.36

Again, try to hook up a external mouse and keyboard

Good Luck!

Posted on Apr 02, 2008

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Yes I have similar probelm. I am not sure what is the main cause behind that and how can I fix it.

Posted on Apr 01, 2008

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  • 3,587 Answers can try to boot from an installtion cd..but without HI options(Human Interface) you may find it's locked..sounds a lot like the Motherboard went south.

You could try to reseat the memory, but that's a low probability approach to this sort of problem

Posted on Mar 30, 2008

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Posted on Jan 02, 2017

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Try attaching an external keyboard, either via a standard keyboard port (usually called a PS/2 port) or via USB. If this works, the internal keyboard may be defective or have a bad connection. Try removing and reinstalling the internal keyboard; if that doesn't work, replace it.

Depending on the laptop model in question, removing the keyboard can be simple or more complex. In some cases, the keyboard can be lifted free of the system by removing a couple of screws on the bottom of the case to enable the top of the bezel around the keyboard to be removed; on some systems with a snap-apart case, you release the bezel with a flat-bladed screwdriver or special case-removal tool. With other models, additional steps might be necessary.

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Problem with a dell computer..


You may try connecting a different usb keyboard to your system. Mostly, some keyboard converted from serial connection to a usb could cause this kind of problem. In some cases also, wireless keyboard and mouse won't work when u turned on your system if the driver is not properly install.

You may also try disconnecting any other usb devices from your computer. Disconnect also your power supply then push and hold the power button for 5 seconds. Plug back in the power cord then connect your keyboard. Turn on your computer. if it doesn't work, i suggest to call your computer manufacturer and check your warranty. This could be an issue with the motherboard of your computer.

Keep me posted.



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