Eeprom Removal And Replacement - HP 400 Series Servicing Manual

5.5.21

EEPROM Removal and Replacement

The EEPROM from a failed CPU board must be installed in a new CPU board if the
CPU board fails. If the existing EEPROM has failed, it should be replaced with a new
one and the system unit's Configure Mode reconfigured for the application.
To obtain a new EEPROM, order a new CPU board.
To remove and replace the EEPROM, refer to Figure 5-39 and follow these steps:
1. Find the EEPROM (U54) on the CPU board.
2. Using an EEPROM puller (part no. 821903-1), remove the EEPROM, noting its
3. If you are replacing the CPU board, remove the EEPROM from the new CPU
4. If you are replacing the CPU board, install the EEPROM from the failed CPU
5. If you are replacing the EEPROM, install the new EEPROM in the CPU board.
5-54 FRU Removal and Replacement
orientation in its socket.
board. Otherwise, skip this step.
board in the new CPU board. Otherwise, skip this step.
Figure 5-39. Model 400s EEPROM Removal