IBM Aptiva 2159 Manual

Also see for Aptiva 2159: Hardware maintenance service

Power-On Password, CMOS ResetA power-on password denies access to the system by an unauthorized userwhen the system is powered on. When a power-on password is active, thepassword prompt appears on the screen each time the system is poweredon. The system unit starts after the proper password is entered.In some cases, you might be required to service a system with an active andunknown power-on password. To clear a password from the system, firstidentify the system CMOS jumper by referring to “System Board Layout” onpage 5-2, then follow these steps.1. Power-off the system unit.2. Unplug the power cable from the electrical outlet.Attention: Do not attempt these steps with the power cord plugged intothe electrical outlet. The power supply maintains +5 V dc of auxiliarypower when the power switch is powered off. System damage mightresult if the power cord is not unplugged during testing.3. Locate the power on password jumper on the system board.4. Move the jumper from pins 1-2 to pins 2-3 to erase the password. See“System Board Layout” on page 5-2.5. The system detects the change and the password, time, and date areerased from memory. Rapid Resume settings are also deleted. (See“Rapid Resume” on page 1-17.)6. Move the jumper from pins 2-3 to pins 1-2 for normal operation.7. Plug the power cable into the electrical outlet and power-on the systemunit.8. Run the Setup Utility to restore the configuration settings. Press Esc tosave with the password disabled.9. When you are finished servicing the machine, run the Setup Utility torestore the configuration settings. (You must reset the time, date, andany Rapid Resume settings. See “Rapid Resume” on page 1-17.)System Board Type JumperSystem Board Type A Password Jumper JP121-12