Unable to detect keyboard

ablawande · 05-09-2008, 09:47 PM

My PC was working fine until about 3 days ago, when I started having problems with my keyboard. I first noticed that it was acting like it had no power until I plugged in the PS/2 port again. The second time this happened, it completely stopped responding.
Since then, I have tried another PS/2 keyboard as well, but the keyboard LEDs flash randomly and there is no response to any key. Thinking that my PS/2 controller may be shot, I tried a known working Logitech USB keyboard. On the USB port, it does not enumerate the device. During POST, the LEDs come on once, but no key response. During windows startup, the LEDs keep flashing, like its continuously trying to enumerate the device.
Other things that I have noticed are that the BIOS does not stop on a keyboard error, although I don't know what the current BIOS setting is. The device manager does not show a keyboard installed, hidden or otherwise. I even performed a BIOS update, made no difference.

My specs:
Intel P4 3Ghz
Intel D915gvwb motherboard with integrated graphics
512 MB RAM
Windows XP SP2

**speedster123** · 05-10-2008, 04:48 AM

make sure pnp and usb functions are enabled in the bios.

ablawande · 05-10-2008, 08:45 PM

I'm not sure how to do that without a functioning keyboard.

dai · 05-10-2008, 09:24 PM

try a cmos reset
turn the computer off
remove the power lead from the back
take the side off
remove the cmos battery
move the cmos jumper from pins 1 and 2 to pin 2 and 3 and the back to pins 1 and 2
replace the battery
put the side on
replug in the power lead
boot the computer

ZimMY · 05-11-2008, 05:53 PM

turn off your comp, unplug it. check the cord make sure it doesnt have any wires exposed etc etc and plug it back in. then turn on your comp. somtimes when u insert a keyboard into a computer while its still on it wont register it untill u turn off the computer and its power supply, or turn off, unplug and plug back in and turn on make sure if your keyboard has any drivers, they need to be loaded up and everything. easy to do that with just a mouse at your disposel

05-09-2008, 09:47 PM	#1 (permalink)
ablawande Registered User Join Date: May 2008 Posts: 2 OS: XP SP2	Unable to detect keyboard My PC was working fine until about 3 days ago, when I started having problems with my keyboard. I first noticed that it was acting like it had no power until I plugged in the PS/2 port again. The second time this happened, it completely stopped responding. Since then, I have tried another PS/2 keyboard as well, but the keyboard LEDs flash randomly and there is no response to any key. Thinking that my PS/2 controller may be shot, I tried a known working Logitech USB keyboard. On the USB port, it does not enumerate the device. During POST, the LEDs come on once, but no key response. During windows startup, the LEDs keep flashing, like its continuously trying to enumerate the device. Other things that I have noticed are that the BIOS does not stop on a keyboard error, although I don't know what the current BIOS setting is. The device manager does not show a keyboard installed, hidden or otherwise. I even performed a BIOS update, made no difference. My specs: Intel P4 3Ghz Intel D915gvwb motherboard with integrated graphics 512 MB RAM Windows XP SP2

05-10-2008, 04:48 AM	#2 (permalink)
speedster123 Mentor Join Date: Oct 2006 Location: United States-New York Posts: 3,829 OS: xp pro My System	Re: Unable to detect keyboard make sure pnp and usb functions are enabled in the bios. __________________ Infection Detection and Removal Thermal Grease Instructions Bench Test

05-10-2008, 08:45 PM	#3 (permalink)
ablawande Registered User Join Date: May 2008 Posts: 2 OS: XP SP2	Re: Unable to detect keyboard I'm not sure how to do that without a functioning keyboard.

05-10-2008, 09:24 PM	#4 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 39,475 OS: vista 32x ultimate retail	Re: Unable to detect keyboard try a cmos reset turn the computer off remove the power lead from the back take the side off remove the cmos battery move the cmos jumper from pins 1 and 2 to pin 2 and 3 and the back to pins 1 and 2 replace the battery put the side on replug in the power lead boot the computer __________________

05-11-2008, 05:53 PM	#5 (permalink)
ZimMY Registered User Join Date: May 2008 Posts: 10 OS: xp	Re: Unable to detect keyboard turn off your comp, unplug it. check the cord make sure it doesnt have any wires exposed etc etc and plug it back in. then turn on your comp. somtimes when u insert a keyboard into a computer while its still on it wont register it untill u turn off the computer and its power supply, or turn off, unplug and plug back in and turn on make sure if your keyboard has any drivers, they need to be loaded up and everything. easy to do that with just a mouse at your disposel