HP ze2300 - Manual (Page 113)

Removal and Replacement Procedures
Maintenance and Service Guide 5–13
5.7 Memory Module
1. Prepare the computer for disassembly (refer to Section 5.3 ).
Memory Module Spare Part Number Information
512-MB 381395-001
256-MB 381394-001
and
403573-001
128-MB 403572-001