Troubleshooting - Texas Instruments Extensa 450 Series Maintenance Manual

5-2 Troubleshooting

WHEN POWER SWITCH
SET TO ON,, NO
INDICATION OF POWER;
SCREEN DARK, STATUS
LED's EXTINGUISHED
SET POWER SWITCH
TO ON. SELFTEST
AUTOMATICALLY RUNS
Figure 5-1 Troubleshooting Flowchart
START
COMPUTER
NO
TROUBLE
INDICATION
?
DEAD
YES
COMPUTER
SYMTOMS
?
NO
RUN
SELF TEST
YES
ERROR
MESSAGE
?
NO
YES
MODEM
PROBLEM
?
NO
RUN
DIAGNOSTICS
YES
DIAGNOSTICS
ERROR MSG
?
NO
SEE
PARAGRAPHS
5.3.1 & 5.3.2
SEE PARAGRAPH
5.3.4
SEE PARAGRAPH
5.3.5
See Appendix D
(PC Doctor)