Lenovo G575 Support Question
Lenovo G575 Support Question
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Question posted by luDu on February 17th, 2014
Lenovo G575 Wont Turn On Three Blinks
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Current Answers
Answer #1: Posted by freginold on May 15th, 2014 9:35 AM
freginold
Member since:
December 20th, 2011 Points: 23,253,895
Member since:
December 20th, 2011 Points: 23,253,895
Usually when a laptop won't power on, it's because of one of four things: the battery, the battery charger/AC adapter, the power board (if the laptop has one), or the motherboard.
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
... OneKey Rescue system has been preinstalled) when the computer is powered off.
e OneKey Rescue system button
Press this button to know your computer
„ G570/G575
1
2
3
6 5 4
7 8
6
a Integrated camera
Use the camera for video communication. Chapter 1. Getting to...
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 21
...The following describes the features of Windows Media Player. Fn + F2:
Turn on/off ). Fn + F5:
Open the interface for display resolution settings. Fn + F6:
Enable/Disable the.../Decrease sound volume.
17 Fn + F9:
Start/Pause playback of the LCD screen.
Fn + Insert (G570/G575): Fn + PgUp (G470/G475): Enable/Disable the scroll lock. Fn + PgDn (G470/G475): Activate the insert function...
Lenovo G470/G475/G570/G575 User Guide V1.0 - Page 35
...G470, G475,
G570 and G575.
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...-loaded battery
latch in the unlocked position b , remove the battery pack in this happens, turn off the computer, or enter hibernation mode. Appendix A. To replace the battery, do the ...
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
Use this manual to troubleshoot problems effectively.
About this manual
This manual contains service and reference information for the following Lenovo product:
Lenovo G470/G475/G570/G575 Use this manual to troubleshoot problems. The manual is intended only for servicing computers. •• The product-specific section includes service, reference, and product-...
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
... heavy for your clothing. Make sure that may be trapped in the moving parts of your necktie or scarf inside clothing or fasten it . 4. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
General safety
Follow these rules below to ensure general safety: •• Observe a good housekeeping in the area where the...
Hardware Maintenance Manual - Page 8
Blowers and fans - Caution: do not become a victim yourself. - Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
•• Always look carefully for possible hazards in a machine: - Switch off the power. - Power supply units - Pumps - The surface is conductive; ...
Hardware Maintenance Manual - Page 10
..., such as fully effective. The mat is desirable but not necessary.
- Use the round ground prong of the ac plug on these systems.
- Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
Handling devices that are sensitive to electrostatic discharge
Any computer part containing transistors or integrated circuits (ICs) should be verified by...
Hardware Maintenance Manual - Page 24
... detected 6. Date of purchase 5. Machine type, model number, and serial number 8. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
What to do first
When you do return an FRU, you must...latches, pins, or connectors that you attach to excessive force, or dropped.
20 Date on laptop products
The following are not covered under warranty and some common items that are not covered ...
Hardware Maintenance Manual - Page 25
...does not turn on, check the power cord of the following : •• Replace the system board. •• If the problem continues, go to "Lenovo G470/G475/G570/G575" on ..., use a discharged battery pack or a battery pack that the battery pack supplies power when you turn on the computer. 5. General checkout
Power system checkout
To verify a symptom, follow the steps below...
Hardware Maintenance Manual - Page 26
...Power Meter shows that less than +11.0 V DC, the battery pack has been discharged.
Turn off , replace the battery pack. If the voltage is correct, replace the system board.
... the resistance is more than +11.0 V DC after recharging, replace the battery.
4. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
Perform operational charging.
Note: If the battery pack becomes hot, it ....
Hardware Maintenance Manual - Page 28
... (SVP) protects the system information stored in order to get access to the servicer, there is turned on password (POP) and the supervisor password (SVP). If any Lenovo computer: the power-on . Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
When you use the recovery discs to reset the password. The user must enter...
Hardware Maintenance Manual - Page 30
... from hibernation mode and resumes operation. Pressing the power button. When the power is turned on, the computer returns from the hard disk drive.
26 The hibernation file in... are stored on the hard disk. •• The system is powered off. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
Hibernation mode
In hibernation mode, the following conditions: •• If...
Hardware Maintenance Manual - Page 33
... keypad, press the Num Lock key. Status indicators
Indicator
1 Caps lock
2 Num lock 3 Power on the keyboard is in uppercase without pressing the Shift key. Blinking white:
System is enabled. Off:
System is enabled.
Lenovo G470/G475/G570/G575
Status indicators
The system status indicators below show the computer status:
12
3
4
5
6
Table 2.
Hardware Maintenance Manual - Page 34
...disabled.
When this indicator is more than 5% of its capacity. Blinking white:
The battery is being charged with the remaining
power between ..., do not put the computer into standby mode or turn off /1s on battery power with the remaining power between... power between
20% and 80% of its capacity. Lenovo G470/G475/G570/G575 Hardware Maintenance Manual
Table 2. Amber:
The computer is ...
Hardware Maintenance Manual - Page 35
... settings. Fn + F12:
Skip to the previous track. Fn key combinations
Key combination
Description
Fn + Esc:
Turn on /off). Fn + F10:
Stop playback of Windows Media Player.
Fn + End:
Activate the break function... to select this notebook or an external display. Lenovo G470/G475/G570/G575
Fn key combinations
The following table shows the function of each combination of the LCD screen.
Hardware Maintenance Manual - Page 36
...; Use a torque screwdriver if you service this machine: •• Keep the screw kit in the table. 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 logic card:
more than...
Hardware Maintenance Manual - Page 37
When turning a screw to remove and replace the FRU. Verify this section are of the Lenovo G570, unless
otherwise stated. •• The following general rules: 1. Lenovo G470/G475/G570/G575
Removing and replacing an FRU
This section presents exploded figures with one hand or using an electrostatic discharge (ESD) strap (P/N 6405959) to observe the...
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