2120 System Board Assembly
 Battery Pack (2020)
 Diskette Drive (2030)
 Hard Disk Drive (2035)
 Keyboard Unit (2040)
 Status Indicator (2060)
 LCD Assembly (2070)
 Speaker Shield Assembly (2080)
 Audio Card (2085)
 Interposer Card (2090)
 DC/DC Card (2100)
 Backup Battery (2110)
 Standby Battery (2105)
Important
The EEPROM on the system board contains the vital
product data (VPD), that is, system unit serial number,
system board serial number, and other computer
unique data. When the system board is replaced, the
system unit serial number must also be restored. Use
the Set system identification utility on the
maintenance diskette to restore the number.
Do not power-off the computer when restoring the
VPD.
The serial number label is attached to the bottom
cover.
284 IBM Mobile Systems HMM
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