IBM Thinkpad A21e 2000 Manual

Checkout guide
Use the following procedures as a guide in identifying and
correcting problems with the ThinkPad computer.
Note:The diagnostic tests are intended to test only IBM
products. The use of non-IBM products, prototype
cards, or modified options can lead to false
indications of errors and invalid system responses.
1. Identify the failing symptoms in as much detail as
possible.
2. Verify the symptoms. Try to re-create the failure by
running the diagnostic test or by repeating the
operation....

If an error code appears, go to“Symptom-to-FRU
index”on page 41.
On the first screen, select the model and pressEnter.
Follow the instructions on the screen.
2. The main panel of PC-Doctor appears.
3. SelectDiagnosticswith the arrow keys, and press
Enter.
A pull-down menu appears. (Its exact form depends on
the model.)
The options on the test menu are as follows:
Diagnostics Interactive Tests
vRun Normal Test
vRun Quick Test
vCPU/Coprocessor
vSystemboard
vVideo Adapter
vSerial Ports
vParallel Ports...

To cancel the test, pressEsc.
Note:After executing PC-Doctor, check the system
time/date and reset them if needed.
Detecting system information with
PC-Doctor
PC-Doctor can detect the following system information:
Hardware InfovSystem Configuration
vMemory Contents
vPhysical Disk Drives
vLogical Disk Drives
vVGA Information
vIDE Drive Info
vPCI Information
vPNPISA Info
vSMBIOS Info
vVESA LCD Info
UtilityvRun External Tests
vSurface Scan Hard Disk
vBenchmark System
vDOS Shell
vTech Support Form
vBattery...

v“Checking the backup battery”on page 32
Checking the ac adapterYou are here because the computer fails only when the ac
adapter is used:
vIf the power problem occurs only when the port
replicator is used, replace the port replicator.
vIf the power-on indicator does not turn on, check the
power cord of the ac adapter for correct continuity and
installation.
vIf the computer does not charge during operation, go to
″Checking operational charging.″
To check the ac adapter, do the following:
1. Unplug the ac...

Checking the battery packBattery charging does not start until the Power Meter
shows that less than 95% of the total power remains;
under this condition the battery pack can charge to 100%
of its capacity. This protects the battery pack from being
overcharged or from having a shortened life.
To check the status of your battery, move your cursor to
the Power Meter icon in the icon tray of the Windows
taskbar and wait for a moment (but do not click), and the
percentage of battery power remaining is...

for Nickel metal hydride battery;
vIf the voltage is more than +8.0 V dc, measure the
resistance between battery terminals 4 and 5. The
resistance must be 4 to 30 K ohm.
If the resistance is not correct, replace the battery
pack. If the resistance is correct, replace the system
board.
Checking the backup batteryDo the following:
1. Power off the computer, and unplug the ac adapter
from it.
2. Turn the computer upside down.
3. Remove the battery pack (see“1010 Battery pack”on
page 51).
4. Remove the...

ThinkPad A21e
Product overview............35
Specifications............35
Status indicators...........36
FRU Tests.............38
Fn key combinations..........40
Symptom-to-FRU index..........41
Numeric error codes..........41
Error messages...........44
Beep symptoms...........45
No beep symptoms..........45
LCD-related symptoms.........46
Intermittent problems..........46
Undetermined problems.........47
FRU replacement notices.........47
Screw notices............47
Retaining serial numbers.........48...

12.1-in. SVGA TFT.........93
14.1-in. XGA TFT..........93
15.0-in. XGA TFT..........93
15.0-in. XGA TFT (LG)........94
Keyboard.............95
Miscellaneous parts..........96
Optional FRUs............98
Common parts list...........99
Tools.............99
Power cords (system)........99
Notices..............100
Trademarks............100
34ThinkPad A21e 

Product overview
This section presents the following product-unique
information:
v“Specifications”
v“Status indicators”on page 36
v“FRU Tests”on page 38
v“Fn key combinations”on page 40
Specifications
The following table lists the specifications of the ThinkPad
A21e series:
Feature Description
Processor Intel®Celeron®processor 600 MHz,
L2 128–KB cache
Bus architecture PCI Bus
Memory (standard) 64 MB (SO DIMM x 1)
Memory (optional) 64 MB or 128 MB DIMM card
(maximum of 256 MB)
CMOS RAM 114 bytes...

Status indicators
The system status indicators show the status of the
computer, as follows:
Indicator Meaning

1BatteryGreen:The battery is fully charged.
Blinking green:
The battery has enough power
to operate, but is being
charged.
Orange:The battery power is low. The
battery is to being charged.
Blinking orange:
The battery needs to be
charged. when the indicator
starts blinking orange, the
computer beeps three times.

2Standby statusGreen:The computer is in standby
mode.
Blinking green:
The...