Texas Instruments Extensa 450 Series, Maintenance Manual

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Error Message Corrective Action
Keyboard Interface Error Cycle Power to Notebook. If
problem persists
Memory Size Mismatch Enter and then exit the System
Configuration Setup in the Setup
utility.
Missing operating system Correct the HDD type and reboot.
Refer to the specification label
pasted on the back side of the
notebook or attached to hard disk
drive.
Non-system disk or disk error. Replace
and strike any key when ready Insert a system disk in drive A and
press any key
Pointing Device Error Cycle Power to Notebook; if
problem persists
Pointing Device Interface Error. Cycle Power to Notebook; if
problem persists, open up the
notebook and check the touchpad
cabling
Protected Mode Test Fail Cycle power to Notebook
RAM BIOS Bad Cycle power to Notebook
RAM Parity Error. Cycle power to Notebook if problem
persists
Real-Time Clock Error Press Ctrl-Alt-Esc to reconfigure
the system.
Video RAM BIOS Bad Cycle power to Notebook
Table A-2 POST Checkpoint List
Checkpoint
No.
Description
D4h Normal POST start
FCh CMOS and BIOS ROM checksum test skip or
complete
01h 80286 register test in-progress
02h CMOS write/read test in-progress or failure
03h BIOS ROM checksum in-progress or failure
04h Programmable Interval Timer test in-progress or
failure
A-2 Error Messages