Lenovo g580 s/n:cb19400572.Backup battery removal and installation instruction.

Connect to external usb keyboard to check. If works ok, your keyboard is defective and you should change it.
See tutorial
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A warning: might look easy but if you are not really familiar with dismounting a laptop, you might end taking your device to a repair shp in a shoebox.

There is three different passwords on Lenovo, but if you really activated POP (power on pass), then you can remove it by removing battery and bios battery as you can read from manual page 35 http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/43y6630_01.pdf
To remove a POP that you have forgotten, do the following:
(A) If no SVP has been set:
1. Turn off the computer.
2. Remove the battery pack.
For how to remove the battery pack, see "1010 Battery pack" on page 63.
3. Remove the backup battery.
For how to remove the backup battery, see "1100 Backup battery" on page 79.
4. Turn on the computer and wait until the POST ends.
After the POST ends, the password prompt does not appear. The POP has been
removed.
5. Reinstall the backup battery and the battery pack.

1. Check to make sure that you have good air flow around the laptop, including sides and bottom.
2. Make sure fan/heatsink area is clear of dirt, etc. If you are using the laptop in an environment where there is a lot of dust, it will clog up the fan/heatsink.
Check the Lenovo support forum to see how the clogged heatsink looks. https://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Y560-overheating-and-shutting-down/m-p/677023
Be aware to get to access to the insides, will require dis-assembly of the laptop. Best left to experts.

You're going to have to make sure you have the drivers installed for the webcam that's on your computer as well as you have the software for it.

You also need to have Adobe flash updated all the way and enable the webcam device through properties.

You can download the drivers and such through the manufacture's website under support and drivers.

For a desktop computer:
Depending on the motherboard of the computer in question you can:

• Locate and change the position of a jumper that will clear the BIOS settings.
• Unplug the machine and pull out the battery that maintains the BIOS settings in RAM.

For the Lenovo x61 and other laptops:
Follow this link to see the laptop manual: http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/42x3550_04.pdf

1. Turn off the computer.

2. Remove the battery pack. (See "1010 Battery pack" on page 60 of the above link.

3. Remove the backup battery. (For how to remove the backup battery, see "1140 Backup battery" on page 82 and page 65 of the above link).
3a. You must remove the keyboard and battery pack to access backup battery.
3b. Remove 4 screws with keyboard icon to remove keyboard.
3c. Gently push the keyboard forward.
3d. Then lift up the keyboard slightly.
3e. Detach the keyboard connector.
3f. Remove keyboard.
3g. Disconnect the backup battery.

4. Turn on the computer and wait until the POST ends.
After the POST ends, the password prompt should not appear. The POP has been removed.

5. Reinstall the backup battery and the battery pack and the keyboard.

Good luck and thanks for using FixYa.

If you are looking for a Power On Password then this is difficult to remove. Click on this link for further details :-
http://www.fixya.com/support/r4335050-remove_bios_power_password_thinkpad

Below is the guide to reset the power on password or BIOS password. The link below is to the service manual that is referred to in the instructions. The RTC or backup battery removal is on page 104.



How to remove the power-on password
To remove a POP that you have forgotten, do the following:
(A) If no SVP has been set:
1. Turn off the computer.
2. Remove the battery pack. For how to remove the battery pack
3. Remove the backup battery. For how to remove the backup battery, see "1140 Backup battery" on page 104.
4. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does not appear. The POP has been removed.
5. Reinstall the backup battery and the battery pack.

http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/39t6193.pdf

if u remove the backup then its very diificult to recover that,

u can asl lenova service center to give a abckup cd

http://www.pdasmart.com/products/19927ipaqparts1900.htm

This PDA is relatively difficult to take apart. I've done it myself and it was very difficult. It is not recommended by any means because you can seriously mess up your ipaq by taking it apart. On the site I gave you after you buy and receive the replacement backup battery, if you do it yourself, will give you a site to get instructions from. You can also send it in to have it done professionally.