Texas Instruments 5000 - Manual (Page 94)

The detailed block diagram, shown in Figure 4-2, is useful in performing
fault analysis of various internal subsystems. For example, a sound
hardware problem can be traced to either the PCMCIA/Sound Board, the
main board, or the interconnecting cabling software. A front panel LED
problem can be the LED Board, Main Board or interconnecting cabling
between the two. Other subsystem problems can be isolated in a similar
fashion using the detailed block diagram as a troubleshooting tool.
START
COMPUTER
TROUBLE
INDICATION
?
DEAD
COMPUTER
SYMTOMS
?
RUN
SELF TEST
ERROR
MESSAGE
?
MODEM
PROBLEM
?
RUN
DIAGNOSTICS
DIAGNOSTICS
ERROR MSG
?
NO
YES
NO
YES
SEE PARAGRAPH
4.2.4
NO
YES
SEE PARAGRAPH
4.2.3.1
NO
NO
WHEN POWER SWITCH
SET TO ON,, NO
INDICATION OF POWER;
SCREEN DARK, STATUS
LED's EXTINGUISHED
SET POWER SWITCH
TO ON. SELFTEST
AUTOMATICALLY RUNS
YES See Paragraphs
4.2.1 and 4.2.2
See PC-Doctor
Reference Manual
Figure 4-1 Notebook Computer Troubleshooting
Flow Chart
4-2 Troubleshooting Procedures