Texas Instruments 51X - Manual (Page 51)

•
Measure the voltage at the AC Outlet or plug in a known good appliance
(EG. a lamp) to verify that voltage is present. If the voltage is OK, try
replacing the AC Adapter
•
Check to see that the battery pack is installed correctly (try using a
recharged battery pack if battery is discharged).
•
If the AC outlet voltage, AC Adapter, and battery packs test normal, but
the computer will not power up, replace the Power Supply Board and/or
Battery Board as described in Section 6.
EXTERNAL
VGA MONITOR
MAIN BOARD
XD BUS
SD BUS
Input From
AC Adapter
SYSTEM &
VGA BIOS
XD BUS
Super I/O
Controller
RS-232
Serial Port
Drivers/
Receivers
C&T 65540
Intel
100 MHz
Penti um
Processor
Vid eo
Controller
System
Controller
State Machine
& Glue Logic
PCMCIA Adapter
Internal Hard Drive
Power Supply
Section
Internal
Tou chp ad
Keyboard/PS2
Mouse Logic
M e mo ry
Board
PCMCIA Option Slot(s)
512KB
Video RAM
Clock Generator
640 X 480
VGA LC D
Inverter
Board
Located internal
to the LCD
Assembly
RAM
Expansion
Modul es
Internal Floppy Drive
Parallel Port
Internal LCD Display
Internal Keyboard
Figure5-2 Troubleshooting Block Diagram
5-4 Troubleshooting