Lenovo ThinkPad L420 Hardware Maintenance Manual page 38

Diagnostics
• Run Normal Test
• Run Quick Test
• CPU/Coprocessor
• Systemboard
• Video Adapter
• Serial Ports
• Fixed Disks
• Diskette Drives
• Other Devices
• Wireless LAN
• Advanced Memory Tests
Notes:
• In the Keyboard test in Interactive Tests, the Fn key should be held down for at least 2 seconds; otherwise, it
cannot be sensed.
• Video Adapter test supports only the LCD display on the ThinkPad Notebook. If you have an external monitor
attached to the computer, detach it before running PC-Doctor for DOS.
• To test Digital Signature Chip, the security chip must be set to Active.
10. Run the applicable function test.
11. Follow the instructions on the screen. If there is a problem, PC-Doctor shows messages describing it.
12. To exit the test, select Quit — Exit Diag. To cancel the test, press Esc.
Note: After running PC-Doctor, check the time and date on the system and reset them if they are incorrect.
Detecting system information with PC-Doctor
PC-Doctor can detect the following system information:
Hardware Info
System Configuration
Memory Contents
Physical Disk Drives
Logical Disk Drives
VGA Information
IDE Drive Info
PCI Information
PNPISA Info
SMBIOS Info
VESA LCD Info
Hardware Events Log
Utility
Run External Tests
Surface Scan Hard Disk
Benchmark System
DOS Shell
Tech Support Form
Battery Rundown
View Test Log
Print Log
Save Log
Full Erase Hard Drive
Quick Erase Hard Drive
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Hardware Maintenance Manual
Interactive Tests
• Keyboard
• Video
• Internal Speaker
• Mouse
• Diskette
• System Load
• Optical Drive Test
• Intel WLAN Radio Test