Thursday, March 03, 2016

LENOVO Thinkpad T410 - T410i – PC Doctor Diagnosis in DOS - AC Adapter testing – Power system check – Battery pack checking procedure – Laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • PC Diagnostics using DOS 
  • AC Adapter Checking 
  • Battery pack testing procedure 


LENOVO Thinkpad T410 - T410i

Diagnostics using PC-Doctor for DOS
The ThinkPad Notebook has a test program called PC-Doctor for DOS (hereafter called PC-Doctor.) You can detect errors by running the diagnostics test included in PC-Doctor.
To create the PC-Doctor diagnostic CD, follow the instructions on the lenovo web .
For some possible configurations of the computer,PC-Doctor might not run correctly. To avoid this problem, you need to initialize the computer setup by use of the BIOS Setup Utility before your unPC-Doctor.
To enter BIOS Setup Utility, do as follows:
1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately pressF1 to enter the BIOS Setup Utility.
Note: If a supervisor password has been set by the customer, BIOS Setup Utility menu appears after the password is entered. You can start the utility by pressing Enter instead of entering the supervisor password; however, you cannot change the parameters that are protected by the supervisor password. On the BIOS Setup Utility screen, press F9, Enter, F10, and then Enter.
PC-Doctor cannot be used to test a device that is in the docking station, even if the computer supports the docking station. To test a USB device, connect it to the USB connector of the computer.
Testing the computer
Note: The PC-Doctor diagnostic CD does not support any optical drives connected through USB devices or any others. It supports only the internal optical drive of the ThinkPad Notebook.
To run the test, do as follows:
1. Turn off the computer.
2. Make sure that the internal optical drive that is supported as a start up device is attached to the computer.
3. Turn on the computer.
4. When the ThinkPad logo comes up, immediately press F12 to enter the Boot Menu.
5. Insert the PC-Doctor CD into the internal optical drive
6. Press cursor keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter.
7. Follow the instructions on the screen.
8. The main panel of PC-Doctor appears.
9. Select Diagnostics with the arrow keys, and press Enter.
Note: You can select an item not only with the arrow keys, but also with the TrackPoint pointer. Instead of pressing Enter, click the left button.
A pull-down menu appears. (Its exact form depends on the model.)
Note: PC-Doctor menu does not mean the formal support device list. Some unsupported device names may appear in the PC-Doctor menu.
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
Power system checkout
To verify a symptom, do the following:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the ac adapter.
4. Check that power is supplied when you turn on the computer.
5. Turn off the computer.
6. Disconnect the ac adapter and install the charged battery pack.
7. Check that the battery pack supplies power when you turn on the computer.
Checking the AC adapter
You are here because the computer fails only when the AC adapter is used.
• If the power problem occurs only when the docking station or the port replicator is used, replace the
docking station or the port replicator.
• If the power-on indicator does not turn on,check the power cord of the AC adapter for correct continuity and installation.
To check the AC adapter, do the following:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the AC adapter cable. See the following figure

Note: Output voltage of pin no.2 of the AC adapter may different from the one you are servicing.
3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:
• Replace the system board.
• If the problem persists, go to “FRU tests” on page 49.
Note: Noise from the AC adapter does not always indicate a defect.
Checking operational charging
To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. 
Perform operational charging. If the battery status indicator or icon does not turn on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon still does not turn on, replace the battery pack. If the charge indicator still does not turn on,replace the system board. Then reinstall the battery pack. If it is still not charged, goto then ext section.
Checking the battery pack
Battery charging does not start until the Power Manager Battery Gauge shows that less than 96% 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 over charged or from having a shortened life. To check your battery, move your cursor to the Power Manager Battery Gauge icon in the icon tray of the Windows task bar and wait for a moment (but do not click),and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Manager Battery Gauge icon.
Note: If the battery pack become shot, it may not be able to charge. Remove it from the computer and leave
it at room temperature for a while. After it cools down, reinstall and recharge it.
To check the battery pack, do the following:
1. Power off the computer.
2. Remove the battery pack and measure the voltage between battery terminals 1(+) and 7 (-). Seethe following figure

3. If the voltage is less than +11.0Vdc the battery pack has been discharged.
Note: Recharging will take at least 3hours,even if the indicator does not turn on.
If the voltage is still less than +11.0V dc after recharging, replace the battery.
4. If the voltage is more than +11.0 Vdc, measure the resistance between battery terminals 5 and 7.
The resistance must be 4 to 30KΩ. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.