Monday, April 11, 2016

Lenovo ThinkPad Yoga 11e Chromebook – How to test the battery charger – How to check the battery pack – How create a repair shim

Category: Laptop Repair and Service 

Contents of this article 

  • How to test the battery pack
  • How to test the charger 
  • How to create a repair shim 

Lenovo ThinkPad Yoga 11e Chromebook

Power system checkout
To verify if a battery and an 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. Turn off the computer.
5. Disconnect the ac 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 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. Disconnect 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.
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the battery
This system supports only batteries specially designed for this specific system and manufactured by Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed for other systems. If an unauthorized battery or a battery designed for another systems is installed, the system will not charge.
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 lower-right corner of the screen 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.
Creating the repair shim
1. Prepare a USB storage device with at least 8 gigabyte (GB) space. The required USB storage capacity depends on the size of the recovery image.
Attention: Creating the repair shim will delete all data stored on the USB device. To avoid data loss, make a backup copy of all the data that you want to keep.
2. Download latest version of the repair shim image from the Lenovo Support Web site at:
Note: Ensure that you create the repair shim using the latest version of the repair shim image. Using an earlier version might cause the repair process to fail.
3. Extract the downloaded file that contains the repair shim image.
4. Download the Win32 Disk Imager tool
5. Run the imager tool and follow the on-screen instructions to create the repair shim.
6. After using the repair shim, if you want to recover normal usage of the USB storage device, you will need
to format the device. Otherwise, you cannot use the storage space on the device