IBM 1200 Hardware Maintenance Manual page 37

If power-on or setup password is forgotten, change Bit 4 of
switch SW1 from 1 to 0 to bypass the password.
Removing the power-on/setup password
If the customer forgets the power-on or setup password,
set the switch SW1, Bit 4 from 1 to 0 firstly to bypass the
two passwords. Then do the followings to remove the two
passwords:
1. Power on the computer and press F1 to enter the
BIOS Utility menu.
2. The main screen displays as below:
↑↓
= Move highlight bar,
3. Using the up or down arrow key, select System
Security.
4. Press the Enter key.
The password selection window appears:
Setup Password -----------------------------------------------
Power-on Password ------------------------------------------
Hard Disk Password ------------------------------------------
↑↓
= Move highlight bar,
5. Move the highlight bar to Power-on/Setup Password.
6. Select None.
7. Save the change, and exit the BIOS Utility menu.
The other way to remove the power-on or setup password:
BIOS Utility
System Information
Basic System Settings
Startup Configuration
Onboard Devices Configuration
System Security
Load Default Settings
↵
= Select, Esc = Exit
System Security
←→
= Change setting, F1 = Help
ThinkPad i Series 1200/1300
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