Hardware Maintenance Manual About this manual This manual contains service and reference information for ThinkStation® computers listed on the front cover. It is intended only for trained servicers who are familiar with Lenovo® computer products. Before servicing a Lenovo product, be sure to read the Safety Information in Chapter 2 “Safety information” on page 3. Chapter 8 “Symptom-to-FRU Index” on page 43 and Chapter 11 “Additional service information” on page 169 are not specific to any machine type and are applicable to all ThinkStation computers. This manual includes a complete FRU part number listing for each machine type and model listed on the front cover.