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 computer.
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:
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 computer.
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.
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.
Restore
of factory default
The Lenovo Flex 3-1120/Flex 3-1130 computer comes with pre-installed OneKey
Recovery System.In order to save application files and the initial backed up
files of the system, the hard disk in a Lenovo computer includes a hidden
partition when it is shipped. If you need to restore the system to the point of
your first boot up, just enter Lenovo OneKey Recovery System and run System
Recovery.
Disassembling
procedure
How to remove Base cover
Remove the screws 1. Then remove the base cover 2.
Remove the screws 1. Then remove the base cover 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 Hard disk
drive
Detach HDD connector in the
direction shown by arrow 1.
Remove the frame fixing screws 2.
Remove the hard disk drive in the
direction shown by arrow 3
