![background image](http://html1.mh-extra.com/html/ibm/thinkpad-a21m/thinkpad-a21m_hardware-maintenance-manual_4074778041.webp)
5. Follow the instructions on the screen. If there is a
problem, PC-Doctor shows messages describing it.
6. To exit the test, select Quit — Exit Diag.
To cancel the test, press Esc.
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 Info
v
System Configuration
v
Memory Contents
v
Physical Disk Drives
v
Logical Disk Drives
v
VGA Information
v
IDE Drive Info
v
PCI Information
v
PNPISA Info
v
SMBIOS Info
v
VESA LCD Info
Utility
v
Run External Tests
v
Surface Scan Hard Disk
v
Benchmark System
v
DOS Shell
v
Tech Support Form
v
Battery Rundown
v
View Test Log
v
Print Log
v
Save Log
v
Full Erase Hard Drive
v
Quick Erase Hard Drive
Power system checkout
To verify a symptom, do the following:
1. Power off the computer.
2. Remove the battery pack.
3. Connect the ac adapter.
4. Check that power is supplied when you power on the
computer.
5. Power off the computer.
6. Disconnect the ac adapter and install the charged
battery pack.
7. Check that the battery pack supplies power when you
power on the computer.
If you suspect a power problem, see the appropriate one
of the following power supply checkouts:
Checkout guide
General descriptions
35
Summary of Contents for ThinkPad A21m
Page 4: ...iv ThinkPad A20m p A21m p A22m p...
Page 28: ...Laser compliance statement 22 ThinkPad A20m p A21m p A22m p...
Page 76: ...Removing and replacing a FRU 70 ThinkPad A20m p A21m p A22m p...
Page 78: ...continued Removing and replacing a FRU 72 ThinkPad A20m p A21m p A22m p...
Page 108: ...continued Removing and replacing a FRU 102 ThinkPad A20m p A21m p A22m p...
Page 157: ...Notices ThinkPad A20m p A21m p and A22m p 151...
Page 158: ...Part Number 23P0896 1P P N 23P0896...