0271 error i know my power on password but i remove my battery ask for date and time change and not except old password.please help ...

you mite cold boot, when the system turned off and nothing is running wait about 10 seconds, than push F10 when you are booting up.

if you want a copy of the bois manual for your motherboard than type the following information

the board############### bios manual

the code error do this
www.ask.com/error 0271 [check the date & time in bois]
/error 0176 [ there isnt one in my tech book]

Input your BIOS password. Contact IBM Support if you have forgotten it: http://support.lenovo.com/en_US/default.page?

Error 0271 Date and time error-Neither the date nor the time is set in the computer. Run IBM BIOS Setup Utility to reset the time and date.

I suspect the CMOS battery needs to be replaced.

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Junior

I have the same problem with a desktop.

To bypass the error, You might need to set the correct date and time every time you power up your laptop. Date and clock setting can be set via CMOS configuration.

You will most likely have to remove the backup battery temporarily to allow the CMOS to clear the password lock.
The instructions for removing the CMOS battery are located here.
Be sure to disconnect the power cord and remove the standard battery when performing this work.
Be very careful to follow the directions exactly as shown.
You may have to leave the CMOS battery removed for a number of hours in order to clear the CMOS password.

Removing the BIOS battery will not remove the BIOS password because the password is stored on an EEPROM chip. The password can be retrieved with difficulty, it requires you to build an EEPROM chip reader. For instructions to remove this password, please click on this link :-
http://www.fixya.com/support/r4335050-remove_bios_power_password_thinkpad

search the internet, most BIOS manufacturers leave a back door for problems like this.

Removing battery or resetting BIOS with jumper will not help. You should call IBM for support on this issue. All thinkpads have a three year warranty, with either return to base or on-site service. Since the R50e is a recent model, you should have no problem getting it serviced directly by IBM. Toll Free: 1-800-IBM-SERV (1-800-426-7378)

Both errors are related to the backup battery which is located under the main battery. It is probably dead. You can get one on eBay for $3.29 w/free shipping or pay a shop $20 to put one in. If you do it yourself be very gentle plugging it into the tricky little slot - it is possible to break the connector loose from the motherboard but it is an easy repair if you have patience and dexterity. As for the password, try just hitting enter. It is the supervisor password to change the BIOS settings and was probably never set.
Hope this helps.
Jon

Hi,
Error code 0271 - Date and time error. Neither the date nor the time is set in the computer.
Run BIOS Setup Utility to reset the time and date
It sounds as though your computer has the wrong time in the CMOS. The CMOS (Complementary Metal-Oxide Semiconductors) is the chip that holds the basic startup information for the BIOS, system and its peripherals while the system is turned on and off.

If you can get into the BIOS check the date and time settings and make sure they are correct.

It may also be a case of the CMOS battery going out. When this happens your computer will tend to not keep the correct time. They are cheap and relatively easy to replace. Before buying a new batter your can try to take it out and let it sit for about 10 minutes or so to reset the CMOS and then go put the battery back in and go into the BIOS and reset the clock.

Hopefully taking the batter out or replacing it will get past your lock icon asking for the password. Just search for CMOS or BIOS default password for your brand of laptop.