Lenovo G575 Support Question
Lenovo G575 Support Question
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Question posted by reWi on October 5th, 2014
Lenovo G575 Wont Turn On Lights Up But Will Not Boot
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Current Answers
Answer #1: Posted by freginold on October 9th, 2014 3:38 AM
freginold
Member since:
December 20th, 2011 Points: 23,253,885
Member since:
December 20th, 2011 Points: 23,253,885
When a laptop won't power on, it's often because of one of four things: the battery, the battery charger/AC adapter, the power board/battery charging board (if the laptop has one), or the motherboard. Without being able to troubleshoot the laptop, it's almost impossible to say for sure which of the components is causing the problem.
You can attempt to rule out the battery by attaching the AC adapter and trying to turn the laptop on. If the laptop turns on when on AC power but won't turn on with the battery, then one of two things is happening: either the battery is bad, or the charger is bad and the battery has run down. If the laptop won't turn on with or without the AC adapter plugged in, then the battery is not the problem. If your AC adapter has an LED on it, you can often tell if the adapter isn't working because the LED won't light up. (However, just because the LED does come on doesn't mean the adapter is working as it should.)
If it doesn't seem to be either the charger/adapter or the battery, then you're probably looking at either the power board or motherboard. If you are comfortable taking the laptop apart, you might want to try replacing the power board, which is the board that the charger plugs into. Amazon.com sells power boards (also sometimes called power jack boards) for many laptops for between $15 and $30.
The motherboard is a more expensive option to replace, so a good rule of thumb is to try the less expensive parts first. If it still won't power on, you may have a bad motherboard, in which case it might be cheaper to get a new laptop than have the motherboard repaired or replaced.
You can attempt to rule out the battery by attaching the AC adapter and trying to turn the laptop on. If the laptop turns on when on AC power but won't turn on with the battery, then one of two things is happening: either the battery is bad, or the charger is bad and the battery has run down. If the laptop won't turn on with or without the AC adapter plugged in, then the battery is not the problem. If your AC adapter has an LED on it, you can often tell if the adapter isn't working because the LED won't light up. (However, just because the LED does come on doesn't mean the adapter is working as it should.)
If it doesn't seem to be either the charger/adapter or the battery, then you're probably looking at either the power board or motherboard. If you are comfortable taking the laptop apart, you might want to try replacing the power board, which is the board that the charger plugs into. Amazon.com sells power boards (also sometimes called power jack boards) for many laptops for between $15 and $30.
The motherboard is a more expensive option to replace, so a good rule of thumb is to try the less expensive parts first. If it still won't power on, you may have a bad motherboard, in which case it might be cheaper to get a new laptop than have the motherboard repaired or replaced.
Related Lenovo G575 Manual Pages
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 1
Lenovo G470/G475/ G570/G575
User Guide V1.0
Read the safety notices and important tips in the included manuals before using your computer.
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 6
...If OneKey Rescue system has been preinstalled) when the computer is powered off.
d Power button
Press this button to turn on page 29.
2
Note: For details, see "OneKey Rescue system" on the computer. b Wireless module antennas ...brilliant
visual output. Getting to know your computer
„ G570/G575
1
2
3
6 5 4
7 8
6
a Integrated camera
Use the camera for video communication.
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 19
... keyboard.
„ Numeric keypad G470/G475
The keyboard has keys that, when enabled, work as a 10-key numeric keypad.
Note: The Num lock indicator will light on if the numeric keypad is enabled.
15 To enable or disable the numeric keypad, press the Num Lock key. G570...
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 21
... LCD screen.
Fn
Increase/Decrease display brightness.
Fn
Increase/Decrease sound volume.
17
Fn + Insert (G570/G575): Fn + PgUp (G470/G475): Enable/Disable the scroll lock.
Fn + Esc:
Turn on /off the integrated camera. Fn + F2:
Turn on /off the backlight of Windows Media Player.
Fn + F6:
Enable/Disable the touchpad.
Fn + End...
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 35
... you are the same for the G470, G475,
G570 and G575. Disconnect the AC
adapter and all cables from the computer. If this chapter are of the Lenovo G570, unless otherwise stated. • The following : 1 Turn off the computer.
2 Close the computer display, and turn the computer over. 3 Unlock the manual battery latch a . Holding...
Hardware Maintenance Manual - Page 3
... Passwords 24 Power-on password 24 Supervisor password 24 Power management 25 Screen blank mode 25 Sleep (standby) mode 25 Hibernation mode 26
Lenovo G470/G475/G570/G575 27 Specifications 27 Status indicators 29 Fn key combinations 31 FRU replacement notices 32
Screw notices 32 Removing and replacing an FRU 33
1010...
Hardware Maintenance Manual - Page 4
..., guidelines, and safety
information required for trained servicers who are familiar with Lenovo products. iv Use this manual to troubleshoot problems. The manual is intended only...product-specific section includes service, reference, and product-specific
parts information.
Before servicing a Lenovo product, make sure to read all the information under "Safety information" on page ...
Hardware Maintenance Manual - Page 5
Safety information
Safety information
This chapter presents the following safety information that you need to get familiar with before you service a Lenovo G470/G475/G570/G575 computer: •• "General safety" on page 2 •• "Electrical safety" on page 3 •• "Safety inspection guide" on page 5 •• "Handling devices that ...
Hardware Maintenance Manual - Page 6
.... •• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for you. •• Do not perform any heavy object:
1. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
General safety
Follow these rules below to ensure general safety: •• Observe a good housekeeping in your elbows. Use a slow lifting...
Hardware Maintenance Manual - Page 8
....
•• Do not touch live electrical circuits with the power on when they are removed from their normal operating places in your work area. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
•• Always look carefully for possible hazards in a machine: - Blowers and fans - Switch off the power. -
Hardware Maintenance Manual - Page 24
...referring to the following list:
The following information in which the machine failed 4. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
What to do first
When you do return an FRU, ... form or parts return form that you attach to excessive force, or dropped.
20 Date on laptop products
The following symptoms might indicate damage caused by the customer. Machine type, model number, and...
Hardware Maintenance Manual - Page 25
...you are here because the computer fails only when the AC adapter is supplied when you turn on page 27. Unplug the AC adapter cable from the AC adapter does not always...following : •• Replace the system board. •• If the problem continues, go to "Lenovo G470/G475/G570/G575" on the computer. 5. If the voltage is acceptable, do the following figure:
Pin
Voltage (V DC...
Hardware Maintenance Manual - Page 26
...
4. If the battery status indicator or icon does not light on , replace the system board.
Note: If the ... displayed.
If the charge indicator still does not light on , remove the battery pack and let it...measure the voltage between battery terminals 5 and 7. Turn off , replace the battery pack. If the... though the indicator does not light on.
If the voltage is not correct, replace...
Hardware Maintenance Manual - Page 27
... image to use the recovery discs that store your backed up data to restore your first boot up files of the system, the hard disk in your computer, you need to restore ...;• "Restoring the factory contents by using OneKey Recovery Restore of factory default
The Lenovo G470/G475/G570/G575 computers come with pre-installed OneKey Rescue System.In order to save application files and the...
Hardware Maintenance Manual - Page 28
Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
When you use the recovery discs to boot your computer, the system will enter the user interface for a scheduled fee...of these passwords has been set, a prompt for any Lenovo computer: the power-on the screen whenever the computer is no service procedure to the servicer, there is turned on by an unauthorized person. Attention: If the SVP...
Hardware Maintenance Manual - Page 30
... within that action: - The hibernation file in the boot record on the hard disk drive is read, and system status is turned on the hard disk. •• The system ...the power is restored from hibernation mode and resumes operation. Pressing the power button. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
Hibernation mode
In hibernation mode, the following occurs: ••...
Hardware Maintenance Manual - Page 34
... the system while the white drive-in use light is being read from or written to the hard disk drive or the optical disk drive. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
Table 2. Blinking amber (100ms...(WLAN/Bluetooth) is on, do not put the computer into standby mode or turn off /3.2s on
battery power with the remaining
power between 5% and 20% of its capacity.
White:
...
Hardware Maintenance Manual - Page 35
... of Windows Media Player. Fn key combinations
Key combination
Description
Fn + Esc:
Turn on /off).
Fn + Insert (G570/G575): Fn + PgUp (G470/G475):
Enable/Disable the scroll lock.
Fn + F5...with a function key. Fn + F10:
Stop playback of Windows Media Player.
Lenovo G470/G475/G570/G575
Fn key combinations
The following table shows the function of each combination of the...
Hardware Maintenance Manual - Page 36
... screwdriver , refer to the torque shown in the table. Screw notices
Loose screws can cause a reliability problem. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
FRU replacement notices
This section presents notices related to plastic Turn an additional 180° after the screw head touches the surface of the plastic part:
more than...
Hardware Maintenance Manual - Page 37
... establish personal grounding by shaking the computer gently and listening for the G470&G475&G570&G575.
33
Before replacing any FRUs that pertain to be damaged by the numbers in place...square callouts. 5. Any of such FRUs are of the Lenovo G570, unless
otherwise stated. •• The following general rules: 1. When turning a screw to , and can cause electrical short circuits. ...
