Saturday, April 23, 2016

Lenovo ThinkPad Edge 13 – How to test the AC adapter – How to check the battery pack - How to check the Backup battery – laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • How to test the battery Pack 
  • How to test the AC adapter
  • How to test the Back up battery 

Lenovo ThinkPad Edge 13

Power system checkout
To verify a symptom, do the following:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the AC adapter.
4. Check 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. Check 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 battery pack”
“Checking the backup battery”
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, do the following:
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 of pin no.2 of the AC adapter may different 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 turn on, remove the battery
pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icons till does not turn on, replace the battery pack.
If the charge indicator still does not turn on, replace the system board. Then reinstall the battery pack. If it is
still not charged, go to the next section.
Checking the battery pack
Battery charging does not start until the Power Manager Battery Gauge shows that less than 96% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life. To check your battery, move your cursor to the Power Manager Battery Gauge icon in the icon tray of the Windows taskbar and wait for a moment (but do not click), and the percentage of battery power remaining
is displayed. To get detailed information about the battery, double-click the Power Manager Battery Gauge icon.
Note: If the battery pack become shot, it may not be able to charge. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.
To check the battery pack, do the following:
1. Power off the computer.
2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 7 (-). See the following figure:
Note: ThinkVantage Toolbox through the "System Health" or through Diagnostics" features will proactively determine if the replacement of battery pack is required. A "POOR" condition indicates battery replacement is required for proper operation.
3. If the voltage is less than +11.0 V dc, the battery pack has been discharged.
Note: Recharging will take at least 3 hours, even if the indicator does not turn on. If the voltage is still less than +11.0 V dc after recharging, replace the battery.
4. If the voltage is more than +11.0 V dc, measure the resistance between battery terminals 5 and 7. The resistance must be 4 to 30 K Ω. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.
Checking the backup battery
Do the following:
1. Power off the computer, and unplug the AC adapter from it.
2. Turn the computer upside down.
3. Remove the battery pack
4. Remove the backup battery
5. Measure the voltage of the backup battery. See the following figure.
If the voltage is correct, replace the system board.
If the voltage is not correct, replace the backup battery.
If the backup battery discharges quickly after replacement, replace the system board.

Lenovo Z370 - Z470 - Z570 – How to removal the battery - How to test the charger – How to Check the battery pack – Laptop repair and service

Category: Laptop Repair and service 

Contents of this article 

  • How to test the battery pack 
  • How to check the AC adapter 
  • Battery removal axis 

 Lenovo Z370 - Z470 - Z570

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 battery pack”
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.
Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows taskbar and wait for a moment (but do not click it), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.
Note: If the battery pack becomes hot, it may not be able to be charged. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.
To check the battery pack, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack and measure the voltage between battery terminals
1 (+) and 7 (-). See the following figure:
3. If the voltage is less than +11.0 V DC, the battery pack has been discharged.
Note: Recharging will be continued for at least 3 hours, even though the indicator does not light on.
If the voltage is still less than +11.0 V DC after recharging, replace the battery.
4. If the voltage is more than +11.0 V DC, measure the resistance between battery terminals 5 and 7. The resistance must be 4 to 30 KΩ. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.
Battery pack removal
Unlock the manual battery latch 1. Holding the spring-loaded battery latch in the unlocked position 2, remove the battery pack in the direction shown by the arrow 3 .

Samsung Galaxy Note – Disassembling procedure – How to replace the Speaker – How to remove the case – Mobiles and Smartphones repair and service

Category: Mobiles and Smartphones Repair and Service 

Contents of this article 

  • How to remove the case 
  • How to remove the battery
  • How to remove the speaker  

Samsung Galaxy Note

DISASSEMBLING PROCEDURE 
Grasp the cap of the stylus and remove it from its slot in the midframe.
Pry with a plastic opening tool, or your fingernail, in the divot to the right of the rear-facing camera, near the volume rocker.
Lift and remove the rear case from the phone.
Battery removal 
Insert your finger in the notch of the battery compartment. Press the battery toward the rear facing camera while pulling outward.
Use the flat end of a spudger, or your fingernail, to press the microSD card slightly deeper into its slot until you hear a click.
After the click, release the card and it will pop out of its slot.
For reassembly, push the microSD card into the slot until it clicks in place.
Remove the microSD card from its slot in the midframe.
Use a plastic opening tool, or your fingernail, to push the SIM card out of its compartment.
Slide the SIM card out the rest of the way with your thumb and remove it from the device.
Remove the nine 3.4 mm Phillips #00 screws securing the midframe to the display assembly.
Insert your plastic opening tool to the left of the power button between the midframe and the front panel assembly and pry.
Slide the plastic opening tool down the seam.
Insert your plastic opening tool to the left of the headphone jack between the midframe and the display assembly. Slide the opening tool along the top edge of the phone. Continue to run the plastic opening tool around the perimeter of the phone until the midframe is separated.
Remove the midframe from the display assembly.
Remove the three 3 mm Phillips #00 screws securing the speaker enclosure to the front panel assembly.
Remove the speaker enclosure from the display assembly.

Lenovo Z41-70 - Z51-70 – Disassembling procedure – How to test the charger – How to remove the keyboard – Factory Default setting – Laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • How to test the battery 
  • How to test the charger 
  • How to remove the keyboard 

Lenovo Z41-70 - Z51-70

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 battery pack”
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.
Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows  taskbar and wait for a moment (but do not click it), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.
Note: If the battery pack becomes hot, it may not be able to be charged. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.
Restore of factory default
The Lenovo Z41-70/Z51-70/ideapad 500-14ACZ/ideapad 500-15ACZ computers come 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 the Keyboard
Remove the screws 1.
Push the keyboard with the tip of an unfolded paper clip (or similar object without a sharp tip) through the screw hole on the back cover. Loosen the keyboard with fingers in the direction shown by arrows 2.
Lift the keyboard slightly 3, and then detach the connectors in the direction shown by arrows 4, 5 and 6. Remove the keyboard.
How to remove the Base cover
Remove the screws 1 and 2.
Remove the base cover in the directions shown by arrows 3 and 4.

Friday, April 22, 2016

Lenovo ThinkPad E450, E455 – How to test the battery charger – How to remove the battery – How to test the battery pack – How to reset the Laptop – Laptop repair and service

Category:Laptop Repair and Service 

Contents of this article 

  • How to test the battery pack
  • How to reset the laptop 
  • How to disconnect the battery 

Lenovo ThinkPad E450, E455

Power system checkout
To verify a power symptom, 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 pack 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 that the battery pack 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 built-in 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 power problem occurs only when the docking station or the port replicator is used, replace the docking station or the port replicator.
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.
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the built-in battery and operational charging
This computer 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.
To check for detailed battery status information, do the following:
For 7: Open the Power Manager program and click the Battery tab.
For 8.1: Open the Lenovo Settings program and click OK.
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. Connect the computer to ac power to charge the battery. If the battery status icon in the Windows notification area indicates that the battery is not charging, remove the battery and let it return to room temperature.
3. Reinstall the battery. If the battery is still not charging, replace the battery pack.
4. Check the battery status icon 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. Disconnect the battery connector.
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.
Performing a recovery operation
This section provides instructions on how to perform a recovery operation using the Rescue and Recovery program.
1. From the Windows desktop, click Start >All Programs > Lenovo ThinkVantage Tools > Enhanced
Backup and Restore. The Rescue and Recovery program opens.
2. In the Rescue and Recovery program main window, click the Launch advanced Rescue and Recovery arrow.
3. Click the Restore your system from a backup icon.
4. Follow the instructions on the screen to complete the recovery operation.
Resetting your computer to the factory default settings
If you want to recycle your computer or just start over, you can reset your computer to the factory default settings. Resetting the computer will reinstall the operating system, reinstall all the programs that came with your computer, and reset all the settings to the factory default settings.
Attention: If you reset the computer to the factory default settings, all your personal files and settings will be deleted. To avoid data loss, make a backup copy of all the data that you want to keep. To reset your computer to the factory default settings, do the following:
1. Move your pointer to the top-right or bottom-right corner of the screen to display the charms. Click Settings > Change PC settings > Update and recovery > Recovery.
2. In the Remove everything and reinstall Windows section, click Get started. Then click Next to confirm the operation.
3. Depending on your needs, do one of the following:
To perform a quick format, click Just remove my files to start the process. The process will take several minutes.
To perform a complete format, click Fully clean the drive to start the process. The process will take several hours.
4. Follow the instructions on the screen to reset your computer to the factory default settings.
Disconnect the battery
Before replacing any FRU, ensure that you have disconnected the battery by doing the following:
1. Loosen the screws 1, and then remove the base cover 2 3.
2. Disconnect the battery 4.