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Dell E521 cannot get to bios with usb keyboard.

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\015 I have a Dell E521 which was working fine. Running Windows Vista.I want to install Windows 7.It has usb keyboard.I cannot get into bios to change boot options to cd.PC wont recognize my usb keyboard.No plug in motherboard for a ps2 keyboard.I tried 4 different keyboards, I cannot get to bios, because I press F2 to go to setup, but nothing happens. Num lock light in kyb does not turn on. I tried all 4 back usb ports and 2 front ones. If I plug my usb optical mouse, I do get the optical red light in the mouse.\015

Answers :

Alright guys, had same issue and have going around it for 4 days...same issue= USB k-board/mouse not responding when dell e521 was booted.....and you know the rest...after trying multiple keyboards and different scenarios... I finally got a solution (at least for me) MY problem was that one of the USB ports (front of PC) was broken and I wasnt aware of it, and the pins were SHORTING inside the port (center pins touching the metal) I had noticed that the KEYBOARD at STARTUP was kind of flashing ramdomly and it would be recognized fater the splash screen and it was due to the SHORT.SO BE PATIENTE AND CHECK ALL USB PORT FOR DAMAGE OR DEBRIS-MAKE SURE ONLY KEYBOARD, MOUSE ARE THE ONLY USB DEVICES HOOKED UP! so there you have it.....Enjoy your fixing!
Check the loose connection on mother board try to reconnecting again then after that power on the computer quickly press f2.
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