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I have a ps/2 keyboard but my ps/2 keyboard com port not working. so i sold a USB keyboard but my CMOS settings are enabled only OS.so i canot entre CMOS setting by keyboard

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Hi,
Unfortunately BIOS reset will not help you, the default setting for USB keyboard support is set to OS and you need set it to BIOS. I would recommend you to go with your mainboard to a specialized service, sometimes the problem is only a defective capacitor. If you reset your CMOS, the first boot device will be set to Floppy. You could try updating your BIOS to the latest version (maybe in that version the USB keyboard is set to BIOS) but I don't know if you can create a batch file to update the BIOS automatically, without confirmation from keyboard... The reliable solution is the technician. You can also try to connect your PS2 keyboard to the mainboard using an USB adapter but as I know in that case the keyboard is treated as an USB device...

If this is the solution for your problem, please rate my post, otherwise give us more details.

Regards,
Andras

Posted on Sep 09, 2010

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1 Answer

I enabled Legacy free on bios and that disabled PS/2 Port mouse and keybord so that I Can't have access to my BIOS to reconfigure it.Please, help me.


you might try resetting the cmos
then you might try using a usb keyboard. I use a usb wireless keyboard with a touchpad and it does the job. Good luck. After you clear the cmos and then turn it back on it should start re-decting the hardware.

Feb 12, 2016 | IBM ThinkCentre M50 8187 Intel Desktop PC...

2 Answers

Keyboard stopped working


http://www.ascendtech.us/emachines-kb-0705-ps-2-keyboard-black_i_kbdemkb0705bps2.aspx

Things I see here.
1) The second Keyboard you plugged wasn't any good either.

2) The PS/2 port for your keyboard on your motherboard, isn't any good anymore.
Computer off, plug it into the Mouse PS/2 port, and use a USB mouse.
BIOS will reset the I/O address for that PS/2 port, and set it for the Keyboard, when the computer is turned back on.

You may have to;
A) Turn the computer off
B) Unplug from power.

C) Press the Power On button in, and hold it in for a count of 10 seconds. Let go of the Power On button. Do this same procedure two more times.

What you are doing is draining residual power, clearing CMOS Error Codes, and resetting BIOS back to the factory default settings.

Keyboard plugged in, USB mouse plugged in, plug the computer back into power. WAIT 1 minute, turn the computer on.

Still no?
Motherboard replacement.

You didn't unplug the old Keyboard, WITH the computer on, and plug the new Keyboard in, did you? It isn't a hot-swap device. The computer must be off when unplugging a mouse, or keyboard.

For additional questions please post in a Comment.
Regards,
joecoolvette

May 28, 2012 | Computers & Internet

1 Answer

My screen shows ' keyboard error or no keyboard present'.... I reset CMOS to default... no help... if I buy a USB keyboard, will USB Legacy still be enabled after defaulting???? THANKS!!!!!!!! ...


Buying a USB keyboard will be the same as using the PS/2 (the round one with the 6 pins), and USB legacy should be enabled by default.
If not, you could still enable it in the BIOS.

Oct 28, 2010 | IBM PS/2 Enhanced Keyboard/Mouse 71G5791

1 Answer

I just buy a4 tecch keyboard (X-slim multimedia) and PORT USB doesn't work... Pleace help me


Hai,

If your keyboard has PS/2 port you have to purchase PS/2 to USB converter and then attache it to your keyboard. Then in your BIOS you have to confirm whether USB keyboard is available and it is enabled or not. If not you have to enable then your USB keyboard works.

Regards

Dec 28, 2009 | A4tech A4 KL-23MU X-Slim multimedia PS/2...

2 Answers

The usb ports will not work,therefore the mouse nor the keyboard will work


Try the mouse in a computer where the USB ports *DO* work.

It is possible that your system does not have the correct "device-drivers" for the USB ports. Thus, those USB ports seem to be "dead".

Turn the computer off.
Connect a PS/2 keyboard and a PS/2 mouse.
Turn the computer on.
Click START
Click Control Panel
Click System
Click Hardware
Click Device Manager
Expand the "USB ports" section of the tree.
Look for "yellow" or "red" marks.
Double-click one of those "problem" devices.
Choose "Reinstall Driver".
If it asks to be able to connect to the Internet, click "yes, this time".
Hopefully, this will install the correct drivers for your USB ports.

Nov 05, 2009 | Dell 2 Button Mouse 6u226

1 Answer

PS/2 PORT


There is nothing that can be easily replaced on a motherboard if your PS2 port has malfunctioned. Check your bios, if you have a setting labelled 'legacy mouse/keyboard support' make sure it's set to enabled. You should still be able to install windows while your keyboard is connected to the USB port. If everything checks out in your bios and you're still having this problem, it could be that you're using a USB to PS2 adapter, which causes some computers to glitch. Try another keyboard if you have one handy, it could simply be a compatibility issue with the windows installer.... rare, but I've been caught with it before.

May 05, 2009 | EliteGroup P4VXMS (P4VXMS-R) Motherboard

2 Answers

Keyboard will not work during post or boot


The problem you are experiencing is caused by a setting in your BIOS. I recommend getting or borrowing a keyboard with a PS/2 port or getting a USB to PS/2 Adapter for Keyboards. Once you do, you can change the setting in the BIOS to accept USB keyboards. If you are already familiar with BIOS then you don't need to read further to enable USB support, other wise I recommend continuing to get familiar with what you are looking for.

When you get a keyboard that uses a PS/2 port, go to the BIOS for your computer. Go to "Advanced" and search for "USB Legacy Support" or something similar in terms of "USB", "keyboard", or "input". Once found, you will have to change the setting to enable USB. If the name of the setting has "USB", then you want it enabled. If it has "keyboard" or "input", then look at the available options for USB and use it unless it has something similar to "dynamic" or "auto-detect" which are better choices.

After finding the right setting and selecting the correct option, go to "Exit" and select "Exit and save changes". Then the BIOS will save and reboot the computer or continue on as if you didn't open up the BIOS.

Aug 15, 2008 | Logitech 967233 Keyboard

1 Answer

USB Non-responsive


Perhaps its the drivers for the USB ports. Do you have or can you borrow a serial mouse and keyboard (PS/2 style)? If not, perhaps a local computer store may have an adapter to convert your USB devices to PS/2. Look at this site to get a visual of the device I am talking about: http://sewelldirect.com/ps2tousb.asp

This will allow you to bypass the USB portion of your computer and allow you to make the necessary changes in BIOS or to see if it is indeed a driver problem.

Apr 27, 2008 | AcerPower 1000 (AP1000EA380M) PC Desktop

1 Answer

Tekram K7KX-A PS/2 keyboard will not work. Get Adapter


the only thing I can suggest in this scenario, is to go through your BIOS again, and check for options to enable/disable your PS2 ports, and that's the best-case outcome.

worst case outcome is that when you were swapping your hard drives, an improper circuit was made, and static (ESD) killed a component on your motherboard. Did you use a grounding strap, or ground yourself when you had the case open? another thing to check for, is if the wires connecting the ports are whole, and not bent or loose.

if this doesn't help, i'd definatly go with the USB adapter, to see if that works. if not, there is a possibility you might have to buy a new motherboard, in itself.

Dec 30, 2007 | Tekram K7KX A Motherboard

1 Answer

Faulty sp/2 connection


Hi,

Most issues of this nature may be resolved by enabling the USB Keyboard Legacy Support and/or all instances of USB in the CMOS/BIOS settings of your motherboard.  Some older models do not have this feature and therefore would really require a PS/2 KB interface.

Hope this be of some idea/help. Good luck and kind regards.

Oct 24, 2007 | Microsoft Multimedia Internet Keyboard...

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