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Lenovo ThinkPad T400 and R400 Service Manual
Service Manual 302 pages · 6.4 MB · EN
This manual provides service and reference information for the ThinkPad T400 and R400 laptops. It includes safety information, handling instructions for electro‑static discharge, and detailed guidelines for servicing the hardware.
The document covers FRU (Field Replaceable Unit) identification and replacement, diagnostic tools such as PC‑Doctor, power‑management features, password recovery, and a comprehensive parts list with part numbers. It is intended for trained service technicians.
Lenovo ThinkPad R400 specifications
| Processor | Intel Core 2 Duo |
|---|---|
| Chipset | Intel GM45 |
| Memory | 1 GB PC3‑8500 DDR3 (up to 2 GB) |
| Hard Drive | 160 GB 5400 rpm SATA |
| Display | 14.1‑inch WXGA |
| Operating System | Windows Vista Home Premium |
All Lenovo ThinkPad R400 documents by type
Service Manual 1
Disassembly, diagnostics and part numbers, for repair.
Product Leaflet 1
Questions answered in these manuals
How do I remove the power‑on password on a ThinkPad T400 or R400?
The procedure is described in the section titled “How to remove the power‑on password”.
What is the part number for this hardware maintenance manual?
The manual’s part number is 43Y6629_03.
What operating system is recommended for the ThinkPad R400/500?
The ThinkPad R400/500 is recommended to run Windows Vista Home Premium.