Click here for instructions and limitations on downloading and creating the diskette.

	Summary of changes
	Installation instructions
	Determining which version is installed

Version 74HT27WW - 1.02
Note: This version of Embedded Controller Program will only work with BIOS Version 1.01a (or higher).

• (Fix) Previously released Embedded Controller 1.01(75HT19WW) may cause a spontaneous wrong key input when using an external PS/2 type keyboard.
  • Numeric characters (2, 4, 6 and 8) will intermittently be inserted during while using the cursor keys.
  • The keyboard behaves as if the shift key is pressed until the shift key is pressed.
    • You can only type only Uppercase characters.
    • Multiple selection with cursor keys
    • Numeric keypad will turn to cursor keys

Version 74HT26WW - 1.01
Note: This version of Embedded Controller Program will only work with BIOS Version 1.00 (or higher).

• (Fix) Fix for battery information query procesiing.
• (Fix) CPU fan state may not be correctly initialized.
• (Fix) Adjustment for CPU thermal sensor error may not work.
• (New) Support "ThinkPad NumLock" control.
• 
  Note: "ThinkPad NumLock" menu item is available in the BIOS Setup Utility only when the BIOS is also updated to version 2.05 (74ET60WW) or later.

Version 74HT25WW - 1.00
Note: This version of Embedded Controller Program will only work with BIOS Version 1.00 (or higher).

• (New) Support for ThinkPad X41.

• Remove the Power-on password prior to updating the Embedded Controller Program in RDM (Remote Deployment Manager) environment or similar environment.
• You need an AC adapter and a charged battery pack to update the embedded controller program.
• Make sure the Embedded Controller Program Service Diskette is write-protected.

1. Print these instructions or display on another system.
2. Firmly connect the AC adapter to the system.
3. Insert the Embedded Controller Program Service Diskette into the diskette drive and turn on the system.
4. Select Read this first from the menu and carefully read the information that appears.
5. Press the Esc key to return to the menu.
6. Select Update Embedded Controller program and follow the instruction on the screen.
   Note: If you are updating the Embedded Controller Program through the USB external diskette drive, it will take quite a long time to complete reading the Embedded Controller Program file, but it is normal. Continue the update.
   
   Attention: Do not turn off or suspend the system until the update has been completed. If you turn off or suspend the system while the update is still in progress, the system board may have to be replaced.
   
   After the update has been completed, the system is automatically turned off.
   Do the following to make sure the Embedded Controller Program is updated correctly.
   
   
7. Make sure there is no diskette in the diskette drive, then turn on the system.
8. While the To interrupt normal startup, press the blue Access IBM button message is displayed at the lower left of the screen, press the Access IBM button.
9. Select Start setup utility. If you have set a supervisor password, the BIOS Setup Utility menu appears after you type in the password.
10. Verify the Embedded Controller Version.
    

1. Make sure there is no diskette in the diskette drive, then turn off the system.
2. Turn on the system.
3. While the To interrupt normal startup, press the blue Access IBM button message is displayed at the lower left of the screen, press the Access IBM button.
4. Select Start setup utility. If you have set a supervisor password, the BIOS Setup Utility menu appears after you type in the password. The embedded controller version is displayed on the first screen of the BIOS Setup Utility.