Reading Or Writing The Eca Information - Lenovo 41896HU Hardware Maintenance Manual

Reading or writing the ECA information

Information on Engineering Change Announcements (ECA) are stored in
the EEPROM of the system board. The electronic storage of this information
simplifies the procedure to check if the ECA has been previously applied to a
machine. The machine does not need to be disassembled to check for the ECA
application.
To check what ECAs have been previously applied to the machine, enable
the ECA Information Read/Write function on the CE Utility Diskette for Lenovo
IdeaPad notebooks.
1. Insert the CE Utility Diskette for Lenovo IdeaPad notebooks, and restart the
computer.
2. From the main menu, select 6. Set ECA Information.
3. To read ECA information, select 2. Read ECA/rework number from
EEPROM and follow the instructions.
4. To read box build date, select 5. Read box build date from EEPROM, and
follow the instructions on the screen.
After an ECA has been applied to the machine, the EEPROM must be updated
to reflect the ECA's application. Apply the CE Utility Diskette for Lenovo
IdeaPad notebooks to update the EEPROM.
Note: Only the ECA number is stored in the EEPROM. The machine type of
the ECA is assumed as the same as that of the machine which had the ECA
applied to it.
1. Insert the CE Utility Diskette for Lenovo IdeaPad notebooks, and restart the
computer.
2. From the main menu, select 6. Set ECA Information.
3. To write ECA information, select 1. Write ECA/rework number from
EEPROM, and follow the instructions.
4. To write box build date, select 4. Write box build date from EEPROM, and
follow the instructions on the screen.
If the system board is being replaced, try to read the ECA information from the
old system board and transfer the information to the new system. If the system
board is inoperable, this will not be possible.
Lenovo IdeaPad Y450
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