Saturday, March 05, 2016

LENOVO IdeaPad S9E - S10E - S10 – AC adaptor checking procedure – Battery Pack checking procedure – Checking the backup battery – Password removal – HDD password reset - Laptop Repair and service

Category: Laptop repair and Service 

Contents  of this article 

  • Battery pack testing procedure
  • Power pack testing procedure
  • Password reset


LENOVO IdeaPad S9E - S10E - S10

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.
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.
# If the computer does not charge during operation, go to “Checking operational charging”
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:

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 icon still 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 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), 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 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:

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 . 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.
Passwords
As many as three passwords may be needed for any IdeaPad computer: the hard-disk password (HDP), the supervisor password (SVP), and the user password. If any of these passwords has been set, a prompt for it appears on the screen whenever the computer is turned on. The computer does not start until the password is entered.
Exception: If only an SVP and a user password are installed, and Password on boot is set to Disabled, the password prompt does not appear when the operating system is booted.
Hard-disk password
Note: Computers with the solid state drive (SSD) do not support the hard-disk password.
There are two hard-disk passwords (HDPs):
# User HDP—for the user
# Master HDP—for the system administrator, who can use it to get access to the hard disk even if the user has changed the user HDP
Note: The Master + User mode requires two HDPs; the system administrator enters both in the same operation. The system administrator then provides the user HDP to the system user.
Supervisor password
A supervisor password (SVP) protects the system information stored in the BIOS Setup Utility. The user enters the SVP to get access to the BIOS Setup Utility and change the system configuration. It also can be used as a power-on password (POP), if Password on boot is set to Enabled.
User password
If a user password has been set and Password on boot is set to Enabled, a password prompt appears on the screen whenever the computer is turned on. The user password is also used to enter the BIOS Setup Utility, but only a part of the options can be set. The user password can be set only when the SVP has been set.
Power-on password
A power-on password (POP) protects the system from being powered on by an unauthorized person. The password must be entered before an operating system can be booted. The SVP and the user password can be used as the POP, if
Password on boot is set to Enabled.
How to remove the hard-disk password
1. Turn on the computer.
2. When the Lenovo logo comes up, immediately press F2 to enter the BIOS Setup Utility.
3. Enter the master HDP.
4. Select Security, using the cursor directional keys to move down the menu.
5. Select Set Hard Disk Passwords.
6. Select Change Master Password.
7. Type the current master HDP in the Enter Current Password field. then leave the Enter New Password field blank, and press Enter twice.
8. In the Changes have been saved window, press Enter.
9. Press F10.
10. Select Yes in the Setup Configuration window. Both user HDP and master HDP will have been removed.
How to remove the supervisor password
To remove an SVP, do the following:
(A) If an SVP is know to the servicer:
1. Turn on the computer.
2. When the Lenovo logo comes up, immediately press F2 to enter the BIOS Setup
Utility.
3. If Password on boot is set to Enabled, enter the SVP.
4. Select Security, using the cursor directional keys to move down the menu.
5. Select Set Supervisor Password.
6. Type the current SVP in the Enter Current Password field. Then leave the Enter
New Password field blank, and press Enter twice.
7. In the Changes have been saved window, press Enter.
8. Press F10; then, in the Setup confirmation window, select Yes .
Both the SVP and the user password will be removed.
(B) If an SVP has been forgotten:
1. Turn on the computer.
2. Unplug the AC adapter cable from the computer.
3. Remove the battery pack.
4. Remove the backup battery.
5. Wait about one minute.
6. Reinstall the backup battery and the battery pack.
Both the SVP and the user password will be removed.
How to remove the user password
To remove a user password that is known to the servicer, do the following:
1. Turn on the computer.
2. When the Lenovo logo comes up, immediately press F2 to enter the BIOS Setup Utility.
3. If Password on boot is set to Enabled, enter the user password.
4. Select Security, using the cursor directional keys to move down the menu.
5. Select Set User Password.
6. Type the current user password in the Enter Current Password field. Then leave the Enter New Password field blank, and press Enter twice.
7. In the Changes have been saved window, press Enter.
8. Press F10; then, in the Setup confirmation window, select Yes .