Monday, June 13, 2016
Lenovo Thinkpad T550 – How to create a recovery media – How to use a recovery media - How to test the AC adapter – How to check the Backup battery – Laptop repair and service
Category: Laptop Repair and Servcie
Contents of this article
- How to create and use recovery media
- How to check the AC adapter
- How to check the Backup battery
Lenovo Thinkpad T550
Power system checkout
To verify if a battery and ac power adapter are functional, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery or the ac power adapter is functional.
4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is still powered on, it means that the ac power adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means the battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
“Checking the ac power adapter”
“Checking the battery and operational charging”
“Checking the coin-cell battery”
Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
If the system status indicator does not blink three times when an ac power source is connected, check the power cord of the ac power adapter for correct continuity and installation.
To check the ac power adapter, do the following:
1. Unplug the ac power adapter cable from the computer.
2. Measure the output voltage at the plug of the ac power adapter cable. See the following illustration:
To verify if a battery and ac power adapter are functional, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery or the ac power adapter is functional.
4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is still powered on, it means that the ac power adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means the battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
“Checking the ac power adapter”
“Checking the battery and operational charging”
“Checking the coin-cell battery”
Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
If the system status indicator does not blink three times when an ac power source is connected, check the power cord of the ac power adapter for correct continuity and installation.
To check the ac power adapter, do the following:
1. Unplug the ac power adapter cable from the computer.
2. Measure the output voltage at the plug of the ac power adapter cable. See the following illustration:
Note: Output voltage of pin 2 of the ac power adapter might differ from the one you are servicing.
3. If the voltage is not correct, replace the ac power adapter.
4. If the voltage is acceptable, replace the system board
4. If the voltage is acceptable, replace the system board
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the battery and operational charging
Checking the operational charging
To check whether the battery charges properly during operation, do the following:
1. Discharge the battery until the remained battery power is less than 50%.
2. Perform operational charging. Click the battery status icon in the Windows notification area to display detailed battery information. If it indicates that the battery is not charging, replace the battery.
3. Check the battery status again. If the same error still exists, replace the system board.
Checking the coin-cell battery
To check the coin-cell battery, do the following:
1. Disable the built-in battery.
2. Remove the coin-cell battery.
3. Measure the voltage of the coin-cell battery. See the following illustration
Checking the battery and operational charging
Checking the operational charging
To check whether the battery charges properly during operation, do the following:
1. Discharge the battery until the remained battery power is less than 50%.
2. Perform operational charging. Click the battery status icon in the Windows notification area to display detailed battery information. If it indicates that the battery is not charging, replace the battery.
3. Check the battery status again. If the same error still exists, replace the system board.
Checking the coin-cell battery
To check the coin-cell battery, do the following:
1. Disable the built-in battery.
2. Remove the coin-cell battery.
3. Measure the voltage of the coin-cell battery. See the following illustration
If the voltage is correct, replace the system board.
If the voltage is not correct, replace the coin-cell battery.
If the coin-cell battery discharges quickly after replacement, replace the system board..
If the coin-cell battery discharges quickly after replacement, replace the system board..
How to Creating recovery media
To create recovery media, you need a USB drive with at least 16 GB of storage. The required USB capacity depends on the size of the recovery image.
Attention: Creating recovery media will delete anything stored on the USB drive. To avoid data loss, make a backup copy of all the data that you want to keep.
To create recovery media, do the following:
Note: Ensure that your computer is connected to ac power.
1. Move your pointer to the top-right or bottom-right corner of the screen to display the charms, and click Search.
2. Typerecovery in the Search field and click the Search button. Then click Create a recovery drive.
3. Click Yes in the User Account Control window to allow the Recovery Media Creator program to start.
4. Ensure that you select the Copy the recovery partition from the PC to the recovery drive. option. Then click Next.
Important: If you clear the Copy the recovery partition from the PC to the recovery drive. option, you will create recovery media without the recovery partition content. You still can start the computer from the recovery media, but you might be unable to recover your computer if the recovery partition on your computer is damaged.
5. Connect a proper USB drive then click Next
To create recovery media, you need a USB drive with at least 16 GB of storage. The required USB capacity depends on the size of the recovery image.
Attention: Creating recovery media will delete anything stored on the USB drive. To avoid data loss, make a backup copy of all the data that you want to keep.
To create recovery media, do the following:
Note: Ensure that your computer is connected to ac power.
1. Move your pointer to the top-right or bottom-right corner of the screen to display the charms, and click Search.
2. Typerecovery in the Search field and click the Search button. Then click Create a recovery drive.
3. Click Yes in the User Account Control window to allow the Recovery Media Creator program to start.
4. Ensure that you select the Copy the recovery partition from the PC to the recovery drive. option. Then click Next.
Important: If you clear the Copy the recovery partition from the PC to the recovery drive. option, you will create recovery media without the recovery partition content. You still can start the computer from the recovery media, but you might be unable to recover your computer if the recovery partition on your computer is damaged.
5. Connect a proper USB drive then click Next
6. Click Create in the Recovery Drive window. The creation of the recovery media starts.
7. When the creation of the recovery media finishes, do one of the following:
To keep the recovery partition on your computer, click Finish.
To delete the recovery partition on your computer, click Delete the recovery partition.
Attention: If you delete the recovery partition on your computer, do keep the recovery media in a safe place. The Windows recovery image will not be stored in your computer anymore, and you will need the recovery media to refresh or reset your computer.
8. Remove the USB drive. The recovery media are created successfully.
How to Use recovery media
If you cannot start your computer, or if you cannot start the Windows recovery image on your computer, use recovery media to recover your computer.
To use recovery media, do the following:
Note: Ensure that your computer is connected to ac power.
1. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press the F12 key. The Boot Menu window opens.
2. Select the recovery drive as the boot device.
3. Select a preferred language and then select a preferred keyboard layout.
4. Click Troubleshoot to display the optional recovery solutions.
5. Select a corresponding recovery solution according to your situation. For example, select Reset your PC if you want to reset your computer to the factory default settings
7. When the creation of the recovery media finishes, do one of the following:
To keep the recovery partition on your computer, click Finish.
To delete the recovery partition on your computer, click Delete the recovery partition.
Attention: If you delete the recovery partition on your computer, do keep the recovery media in a safe place. The Windows recovery image will not be stored in your computer anymore, and you will need the recovery media to refresh or reset your computer.
8. Remove the USB drive. The recovery media are created successfully.
How to Use recovery media
If you cannot start your computer, or if you cannot start the Windows recovery image on your computer, use recovery media to recover your computer.
To use recovery media, do the following:
Note: Ensure that your computer is connected to ac power.
1. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press the F12 key. The Boot Menu window opens.
2. Select the recovery drive as the boot device.
3. Select a preferred language and then select a preferred keyboard layout.
4. Click Troubleshoot to display the optional recovery solutions.
5. Select a corresponding recovery solution according to your situation. For example, select Reset your PC if you want to reset your computer to the factory default settings
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