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The keyboard only is not responding on acer extensa 4630z

Only the keyboard on my Acer extensa 4630z is not responding
, the touchpad is working , every thing is ok, I replaced the keyboard with new one , the same problem, also i have updated the bios to the last version , no progress , i can see it defined and detected in device manager , there is no msg error to guid me anywhere, the same problem in vista or xp.
I am now using an external USB kkeyboard to be able to work.
please help . thanks

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Hello,

Does this issue also happen in Safe-Mode ? As you seem experienced with troubleshooting, I can only recommend to replace the mainboard, as it has a keyboard function failure. As the USB keyboard is, as it says, controlled by USB, it is controlled differently.

What you can also try is to remove the battery and retry on A/C. On some acer models, a faulty battery gives loads of issues but still powers the laptop up and seems like a software problem.

Last but not least try having only MB, A/C, External monitor and Keyboard connected on MB with RAM, and CPU, CPU FAN so that only the laptop core components are running.

Posted on Jun 01, 2010

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