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Keyboard and Mouse not responding after CMOS Battery replacement.

Resolved a CMOS Check Sum error, Replaced Battery hit F1 and F11 for recovery now It will boot up to windows logon; however does not reconize Keyboard or Mouse.

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  • Jmt_tech07 Apr 30, 2008

    Still the computer will not respond to the fuction keys, F2-F10-F5- aor F-8

  • Anonymous Apr 30, 2008

    upon boot up the function keys are not responding. Example hit F2 for BIOS setup does not respond continues to boot into windows yet the Keyborad or Mouse does not work.

  • girishjegana Nov 23, 2008

    yea i hav dis same pblm

  • melanieharri Feb 14, 2009

    my keyboard or mouse won't respond I bought several mouses and none work. hit keys on keyboard and none work can someone help me? Melanie



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You may have to reset (turn on) those devices in the CMOS setup.
Typically, you can access that menu by holding down either F5 or F8 (not always the same) and then turning the power on.
One of these should bring up a simple menu with 8-10 choices.
Depending on the BIOS used, setting input/output devices may be semiautomatic or manual.

Posted on Apr 30, 2008


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It appears that the USB ports can't read any devices at all such as mouse or flash drive

What type of computer are you using? If it is a laptop, try disconnecting all of the peripherals and the charger. Then remove the battery. Press and hold the power button for 15-30 seconds. Reconnect things and try to see if the computer boots up and then recognizes the devices. Try a minimal number of peripherals to start. For a desktop, you can try something similar (disconnect your power cord from both the computer and the outlet) or access the motherboard and remove the CMOS battery (or use the clear CMOS jumper).

For Windows on a laptop, use the unit's laptop and touchpad to enter the Device Manager. Uninstall the USB drivers (Start > Control Panel > Hardware and Sound > Device Manager in Windows 7). Then restart the computer. If you have a desktop with a PS2 keyboard, you can do the same thing by using the keyboard. (Windows Key > Control Panel and use the arrow keys).

Try accessing the keyboard when you turn on the computer. For this you need to press and release the key every second from the time you press the power button. Try F8 to boot into safe mode (then delete drivers) or return to a known good version of Windows. Try entering the BIOS (F1, F2 or F10 depending on the brand of computer). If you have a recovery CD (install or upgrade disc), try booting to the CD and repairing Windows to a known good state. If your computer has a recovery partition, you can try rolling back the system by pressing F11.

I hope this helps.

Cindy Wells
(I've had this happen on a laptop and the reset via the power button worked when the battery was removed. On a desktop, it went back to HP under warranty since I couldn't get any keyboard to respond.)

Apr 05, 2011 | Computers & Internet

1 Answer

Laptop not used for some years. could enter bios OK to reset Replaced U/S CMOS battery with no problem. Restarted............ Message press F1 ibm bios setup press F11 to invoke IBM product recovery...

I received an IBM laptop with same issue a few months back. The error message due to the drained out CMOS RTC (coin-cell battery), which retains and other BIOS settings.
The system is OK and all you have to do is to get the CMOS/RTC battery replaced by the a professional.
Good Luck!

Dec 31, 2010 | IBM ThinkPad R30 2656 Notebook

1 Answer

My 6735s keeps not responding,wont recognise discs and also i cant do a full system recovery as f7 and f11 are missing?Is there anything i can do?I cannot use my recovery disc with these problems...

Can you see the boot up CMOS display with HP Logo? If so plug a USB external keyboard and press F11 while boot up process. Then it will prompt for Recovery loading.

Jan 18, 2010 | HP Compaq 6735s Notebook

2 Answers

System wont boot

Disconnect all devices except keyboard and mouse and master cd or DVD. unplug then hit power button. Plug back in. Hit power and hopefully you get to BIOS. If you do make sure you save the BIOS before you leave to start OS. Keep me informed and I'll keep checking your listing to see if its working or not.

Sep 24, 2009 | Computers & Internet

2 Answers

Not booting up

on the motherboard you will be having the 2032 CMOS battery cell remove that and replace that after 5 or 10 mins or put the battery cell new one and after that try booting your system then you will get the CMOS error after that try setting your CMOS if your keyboard works and save it and then exit the error will not come up again ..
if you are unable to identify the CMOS battery just refer to your motherboard manual it will be clearly mentioned where it is located ..

if you still couldnt able work with the keyboard then this may be due to 2 causes
1) The BIOS might have got corrupted ..
if so then change the BIOS jumper to recovery mode. to change to recovery mode just you can refer to the motherboard manual it will be mentioned more clearly how to do it ... once you do this the keyboard will work..

2) The capacitor near by the ports might have dead so due to that you might not get the power supply to the ports in the motherboard ..

if the capacitor is dead then you must visit the motherboard technician and get it replaced ..

thank you
bye any doubts you can reply me
i am always here to assist you
please rate my solution
have a nice day

Sep 02, 2008 | Intel Motherboard

1 Answer

Cmos checksum error - defaults loaded

Ports are usually labelled - look carefully.
Try manufacturers manual.
Could be that keyboard is the larger 5 pin DIN socket (old IBM AT keyboard).

Aug 10, 2008 | Computers & Internet

2 Answers


sounds like your cmos 3 volt battery is dead and needs replaced.
its a very small coin size battery located/hidden inside the laptop.
you will have to google the placement or just find it.

Mar 24, 2008 | IBM ThinkPad 380ED

2 Answers

Ibm 600x errors 173, 163 & 301

Take the battery out and bootup it should work then....

Mar 03, 2008 | IBM ThinkPad 600X Notebook

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