Service Guide
Page 57
... the AC outlet and then unplugging the AC adapter from the computer. 4. Replace the RTC battery and reassemble the computer. 8. All passwords and all external devices connected to the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down... the computer. Remove the RTC battery (see Battery on the computer. NOTE: These steps also clear CMOS. Unknown user password If the computer you are servicing has an unknown user password, follow these steps to clear the password.
... the AC outlet and then unplugging the AC adapter from the computer. 4. Replace the RTC battery and reassemble the computer. 8. All passwords and all external devices connected to the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down... the computer. Remove the RTC battery (see Battery on the computer. NOTE: These steps also clear CMOS. Unknown user password If the computer you are servicing has an unknown user password, follow these steps to clear the password.