Friday, May 27, 2016

Lenovo IdeaPad U300e - Ultrabook – How to test the battery charging adapter voltage – How to remove the internal battery – How to remove the HDD – Laptop repair and service

Category: Laptop Repair and Servcie 

Contents of this article 

  • How to remove the battery 
  • How to remove the HDD 
  • How to test the AC adapter 

Lenovo IdeaPad U300e

To verify a symptom, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the AC adapter.
4. Make sure 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. Make sure that the battery pack supplies power when you turn on the computer.
If you suspect a power problem, see the appropriate one of the following power
supply checkouts:
“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 does not light on, 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 still does not light on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.
Restore of factory default
The Lenovo IdeaPad U300e computers come with pre-installed OneKey Rescue 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 Rescue System and run Restore to factory default. For details of OneKey Rescue System
DISASSEMBLING PROCEDURE 
Base cover
Note: Turn off the computer first. Otherwise, it may cause permanent damage to the computer.
Open the rubbers and remove two screws 1, then remove the base cover in the direction shown by arrow 2 3.
Battery pack
DANGER: Only use the battery specified in the parts list for your computer. Any other battery could ignite or explode.
Detach the battery pack connector in the direction shown by arrow 1, remove five screws 2, and then remove the battery pack in the direction shown by arrow 3
Hard disk drive
Attention:
# Do not drop the hard disk drive or apply any physical shock to it. The hard disk drive is sensitive to physical shock. Improper handling can cause damages and permanent loss of data.
# Before removing the drive, suggest the customer to backup all the information on it if possible.
# Never remove the drive while the system is operating or is in suspend mode.
Lift the HDD a little, detach the HDD connector in the direction shown by arrow 1, and then remove the hard disk drive from the slot in the direction shown by arrow 2