Texas Instruments EXTENSA 570CD - Manual (Page 17)

1.5 Standard Test Features
The Extensa Series Notebook Computers use modular design and built-in
test features to reduce the mean time to repair. A power on self test
program automatically verifies the operational state of the primary circuits.
Also, the notebook contains a powerful suite of diagnostic tests called
PC-Doctor, (described in detail in Appendix B) that can perform additional
levels of diagnostic testing.
1.6 Notebook Assemblies and
Subassemblies
The Extensa Series Notebooks are modular in design and can be
disassembled for maintenance purposes using a standard set of flat-bladed,
Phillips-head and hexagonal screwdrivers. The major assemblies that
comprise a typical notebook in the Extensa family are shown in Figure 1-6
and briefly described in the following paragraphs.
General Description 1-9