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© Lenovo 2005. 158
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ThinkPad G40, G41
About this manual
This manual contains service and reference information for ThinkPad G40 and G41 products. Use this manual along with the advanced diagnostic tests to troubleshoot problems. The manual is divided into sections as follows: v The common sections provide general information, guidelines, and safety information required in servicing computers. [. . . ] The system board must be replaced for a scheduled fee.
How to remove the power-on password
To remove a POP that has been forgotten, do the following: (A) If no SVP has been set: 1. For how to remove the battery pack, see "1010 Battery pack" on page 66. For how to remove the backup battery, see "1060 Backup battery" on page 72. Turn on the computer; then, while the "To interrupt normal startup, press F1" message is displayed at the lower-left of the screen, press F1. When the Enter New Password field opens, leave it blank and press Enter twice. Press F10; then, in the Setup confirmation window, select Yes.
How to remove the hard disk password
Attention: If User only mode is selected and the user HDP has been forgotten and cannot be made available to the neither Lenovo nor Lenovo authorized servicers provide any services to reset the user HDPs or to recover data from the hard disk drive. To remove a user HDP that has been forgotten, when the SVP and the master HDP are known, do the following: 1. Turn on the computer; then, while the "To interrupt normal startup, press the blue Access SONY button" message is displayed at the lower-left of the screen, press the Access SONY button. Select Hard-disk x password, where x is the letter of the hard disk drive. Enter the master HDP; then leave the New Password field blank and press Enter twice. Select Yes in the Setup Configuration window.
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ThinkPad G40, G41
Related service information
Both user HDP and master HDP will have been removed.
Power management
To reduce power consumption, the computer has three power management modes: screen blank, standby, and hibernation.
Screen blank mode
Screen blank mode has three variants, as follows: 1. Insert the PC-Doctor disk into the diskette drive; then power on the computer. If the computer cannot be powered on, go to "Power system checkout" on page 38, and check the power sources. If an error code appears, go to "Symptom-to-FRU index" on page 52. (Its exact form depends on the model. ) Note: PC-Doctor menu does not mean the formal support device list. The options on the test menu are as follows:
Diagnostics v v v v v v v v v v v v v Run Normal Test Run Quick Test CPU/Coprocessor Systemboard Video Adapter Parallel Ports Fixed Disks Diskette Drives Other Devices Communication Wireless LAN Memory Test Full Memory Test Quick Interactive Tests v v v v v v v v Keyboard Video Internal Speaker Mouse Diskette System Load CD-ROM/DVD Test Actiontec Wireless Radio
Notes: v In the Keyboard test in Interactive Tests, the Fn key should be held down for at least 2 seconds; otherwise, it cannot be sensed. v Video Adapter test supports only the LCD display on the ThinkPad computer. Note: After executing PC-Doctor, check the system time/date and reset them if needed.
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ThinkPad G40, G41
Checkout guide
Detecting system information with PC-Doctor
PC-Doctor can detect the following system information:
Hardware Info
v v v v v v v v v v System Configuration Memory Contents Physical Disk Drives Logical Disk Drives VGA Information IDE Drive Info PCI Information PNPISA Info SMBIOS Info VESA LCD Info
Utility
v v v v v v v v v v v 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
General descriptions
37
Checkout guide
Power system checkout
To verify a symptom, do the following: 1. 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: v "Checking the ac adapter" v "Checking operational charging" on page 39 v "Checking the battery pack" on page 39 v "Checking the backup battery" on page 40
Checking the ac adapter
You are here because the computer fails only when the ac adapter is used: v If the power-on indicator does not turn on, check the power cord of the ac adapter for correct continuity and installation. v If the computer does not charge during operation, go to Checking operational charging. See the following figure:
Pin 1
Voltage (V dc) Vcc_+ 16V Ground Vcc_+ 16V Ground
1 3 4
2
2 3 4
3. [. . . ] Japan Argentina Brazil P/N 13H5264 74P4331 36L8870 49P2095
For 3-pin power cords:
Region Australia, New Zealand Canada, U. S. Italy Denmark U. K. , China (Hong Kong S. A. R. ) European countries India, South Africa Israel Korea China (P. R. C. ) (other than Hong Kong S. A. R. ) Switzerland P/N 76H3514 76H3516 76H3530 76H3520 76H3524 76H3518 76H3522 76H3532 76H3535 02K0539 76H3528
ThinkPad G40, G41
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Notices
Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. [. . . ]