Wednesday, May 11, 2016

Lenovo N22 – Disassembling procedure – How to remove the battery pack – How to test the battery charge – How to remove the LCD Display unit - Laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • How to test the battery charger
  • How to remove the battery pack
  • How to remove the LCD display 

Lenovo N22

To verify a symptom, follow the steps below:
1. Turn off the computer.
2. Connect the AC adapter.
3. Make sure that power is supplied when you turn on the computer.
4. Turn off the computer.
5. Disconnect the AC adapter.
6. Make sure that the battery pack supplies power when you turn on the
If you suspect a power problem, see the appropriate power supply checkout:
“Checking the AC adapter”
“Checking operational charging”
Checking the AC adapter
You are here because the computer fails only when the AC adapter is used.
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, follow the steps below:
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 for the AC adapter pin No. 2 may differ 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.
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 is not lit, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon is still off, replace the battery pack. If the charge indicator is still not lit, replace the system board
How to remove Base cover
Remove the screws 1. Carefully pry off the base cover and lift it up in the direction shown by arrow 2.
How to remove Battery pack
Unplug the battery connector 1 and remove the screws 2. Then remove the battery pack in the direction shown by arrow 3.

How to remove LCD unit
Disconnect the camera cable connector 1. Remove the screws 2.
Open the hinges 3, then remove the upper case from the LCD unit in the direction shown by arrow 4.