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I have attached an external keyboard(USB) to my laptop dell inspiron 1525.

Problem is i am able to use the keyboard with the power cable unplugged , but as soon as the power cable is plugged in i am not able to use the keyboard.

Please suggest and let me know if you need some more information.

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have you tried other usb ports while the power cord is attached? – Moab Sep 24 '12 at 16:27
yes, i tried just now after u told...:) but still the same problam – munish Sep 24 '12 at 16:40
have you faulty or broken Cables either on the keyboard or the powercable? does the keyboard work after you plugged it in and made a rebook of the computer? – Crujach Sep 25 '12 at 10:29
i made reboot twice but still the problem was there, but in the night i shut it down and when i used it in the morning it was working fine.Don't know what caused the problem anyway thanks everybody. – munish Sep 26 '12 at 5:31

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