Lenovo B575 Support Question
Lenovo B575 Support Question
Find answers below for this question about Lenovo B575.Need a Lenovo B575 manual? We have 4 online manuals for this item!
Question posted by trkmelr on June 12th, 2014
Lenova B575 Wont Power On
The person who posted this question about this Lenovo product did not include a detailed explanation. Please use the "Request More Information" button to the right if more details would help you to answer this question.
Current Answers
Answer #1: Posted by freginold on September 3rd, 2014 10:47 AM
freginold
Member since:
December 20th, 2011 Points: 23,253,895
Member since:
December 20th, 2011 Points: 23,253,895
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 themotherboard.
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 B575 Manual Pages
Lenovo B575 Setup Poster V1.0 - Page 1
...applications quickly and encrypt private data to the AC adapter.
3 Press the power button
B575
4 Configure the operating system following the on special features, see the Help...Initial setup instructions
1 Install the battery pack
1 3
2
1
2 Connect to the power
2 1 3
Attention: Connect the power cord to the AC adapter firmly, poor connections may contain items that are either registered ...
Lenovo B575 Setup Poster V1.0 - Page 2
...only)
Use this manual may differ from the actual product.
External devices connection
Ethernet
1
B575
2
3
Notes: • The above connection illustration is mercury-free and more energy-...and
compatibility when purchasing external devices. You are responsible for video-centric applications.
2 Power button / OneKey Rescue system button*
Start the computer. Follow the instructions shipped ...
Lenovo B575 User Guide V1.0 - Page 19
Learning the basics
Special keys and buttons
B575
„ OneKey Rescue system button
• When the computer is powered-off, press this button to enter the OneKey Rescue system if Lenovo OneKey Rescue system has been preinstalled.
• In Windows operating system, press this button to start Lenovo OneKey Recovery. Note: For details, see "OneKey Rescue system" on page 23.
15 Chapter 2.
Lenovo B575 User Guide V1.0 - Page 20
Learning the basics
System status indicators
These indicators inform you of the computer status.
$
%
&
B575
'
(
)
a Caps lock indicator b Num lock indicator c Hard disk drive indicator d Power status indicator e Battery status indicator f Wireless communication indicator
16 Chapter 2.
Hardware Maintenance Manual - Page 3
...information about replacing RoHS compliant FRUs 18
General checkout 19 What to do first 20 Power system checkout 21
Checking the AC adapter 21 Checking operational charging 21 Checking the ... discs 23 Passwords 24 Power-on password 24 Supervisor password 24 Power management 25 Screen blank mode 25 Sleep (standby) mode 25 Hibernation mode 26
Lenovo B575 27 Specifications 27 Status ...
Hardware Maintenance Manual - Page 8
... are moist floors, nongrounded power extension cables, power surges, and missing safety grounds.
• Do not touch live electrical circuits with the reflective surface of the units.)
• If an electrical accident occurs: - Motor generators and similar units. (This practice ensures correct grounding of a plastic dental mirror. Lenovo B575 Hardware Maintenance Manual
•...
Hardware Maintenance Manual - Page 24
... or the installation of
an incompatible card • Improper disk insertion or use . Date on laptop products
The following information in the parts exchange form or parts return form that the system was detected 6. Lenovo B575 Hardware Maintenance Manual
What to do first
When you do return an FRU, you attach to...
Hardware Maintenance Manual - Page 25
... during operation, use a discharged battery pack or a battery pack that the battery pack supplies power when you are here because the computer fails only when the AC adapter is acceptable, do the... • If the problem continues, go to "Lenovo B575" on page 22
Checking the AC adapter
You are servicing. 3. If you suspect a power problem, see the appropriate one of the AC
adapter for...
Hardware Maintenance Manual - Page 26
... not start until the Power Meter shows that less ...pack.
To check your battery, move your cursor to the Power Meter icon in the icon tray of its capacity.
Note: ...percentage of the total power remains;
If it . To get detailed information about the battery, double-click the Power Meter icon. After ... it is still less than 95% of battery power remaining is less than +11.0 V DC, ...
Hardware Maintenance Manual - Page 27
...disk in your critical data before you need to restore the system to the point of factory default
The Lenovo B575 computers come with pre-installed OneKey Rescue System. Note: You can use the pre-installed Lenovo OneKey Recovery and... contents by using OneKey Recovery" on page 23 • "Passwords" on page 24 • "Power management" on the system partition (C drive), which is shipped.
Hardware Maintenance Manual - Page 28
... system from being powered on the screen whenever the computer is entered. If any Lenovo computer: the poweron password (POP) and the supervisor password (SVP).
The system board must enter the SVP in the BIOS Setup Utility. Please follow the prompt to insert the backup discs to 2 hours. Lenovo B575 Hardware Maintenance...
Hardware Maintenance Manual - Page 30
Lenovo B575 Hardware Maintenance Manual
Hibernation mode
In hibernation mode, the following conditions: • If a "hibernation time"... connector, or the diskette drive within that action: - Closing the lid. - The hibernation file in suspend mode. Pressing the power button. To cause the computer to enter hibernation mode, follow the steps below: • If you are using the ACPI operating...
Hardware Maintenance Manual - Page 34
...sleep mode. off .
30 Flashing white:
The wireless LAN radio is turned on battery power with the remaining power between 5% and 20% of its capacity, or the computer is less than 80% ...in hibernate mode or shut down. Lenovo B575 Hardware Maintenance Manual
d Power on and not connected to AP. Blinking white:
System is being charged with the remaining power between 20% and 80% of its...
Hardware Maintenance Manual - Page 37
...FRU. Before touching it, establish personal grounding by removing any of damaging parts. 2. Lenovo B575
Removing and replacing an FRU
This section presents exploded figures with one hand or using an ...ESD) strap (P/N 6405959) to service any computer unless you have made sure that all power cords from electrical outlets, remove the battery pack, and then disconnect any FRUs that pertain...
Hardware Maintenance Manual - Page 52
Lenovo B575 Hardware Maintenance Manual
Figure 9. Removal steps of keyboard bezel (continued)
Remove the keyboard bezel in the direction shown by arrow g.
7
Remove the screw h, and then remove the power board i.
8 9
Step
h
Screw (quantity)
Color
M2 × 3.5 mm, flat-head, nylok-coated (1) Black
Torque 2.5 kgfcm
48
Hardware Maintenance Manual - Page 68
Lenovo B575 Hardware Maintenance Manual
Locations
Front view
a Integrated camera (Select models only) b Wireless module antennas (Select models only) c Speaker d Power button e OneKey Rescue System button f Built-in microphone g System status indicators
Note: For the description of each indicator, see "Status indicators" on page 29. h Touchpad i ...
Hardware Maintenance Manual - Page 71
Lenovo B575 Parts list
This section presents the following service parts: • "Overall" on page 68 • "LCD FRUs" on page 72 • "Keyboard" on page 74 • "Miscellaneous parts" on page 76 • "AC adapters" on page 77 • "Power cords" on page 78
Notes: • Each FRU is available for all types or models, unless specific types or
models are specified.
67
Hardware Maintenance Manual - Page 73
... "LCD FRUs" on page 72.)
2 Keyboard (see "Keyboard" on page 74.)
3 LB57 UPPER CASE ASSY W/TP&MIC
31048999 N
4 LB575 POWER BOARD
31050449 N
5 LB57 LED BOARD W/CABLE
31048995 N
6 LB575 FINGER PRINT BOARD
31050448 N
7 LB575 MB UMA W/BT
11013664 N
7 LB575 MB...11012810 **
13 DDRIII 1333 1GB, M471B5773CHS-CH9(Rev C /2Gb/ 46nm)
11012630 **
69 Lenovo B575
Table 5.
Parts list-Overall
No.
Hardware Maintenance Manual - Page 80
Lenovo B575 Hardware Maintenance Manual
Miscellaneous parts
Table 8. Parts list-Miscellaneous parts FRU
System miscellaneous parts: • (a) LA57 FINGER PRINT BRACKET • (b) LA57 HDD BRACKET ASSY • (c) LA57 ODD BRACKET • (d) LB57 TOUCHPD BRACKET Cable miscellaneous parts: • (e) LA57 POWER BOARD CABLE • (f) LA57 TOUCHPAD CABLE • (g) LA57 FINGER PRINT BOARD ...
Hardware Maintenance Manual - Page 86
...174; VeriFace® OneKey Rescue® (OneKey Recovery, OneKey Antivirus) APS® Power Express® Energy Management and ReadyComm®
The following are trademarks of this document ... been made on generally available systems. Furthermore, some measurements may vary.
Lenovo B575 Hardware Maintenance Manual
Any performance data contained herein was determined in the United States...
Similar Questions
Take Wifi Card Out Lenova B575 Laptop
take wifi card out lenova b575 laptop
take wifi card out lenova b575 laptop
(Posted by Anonymous-69955 11 years ago)
Take Wifi Card Out Lenova B575 Laptop
take wifi card out lenova b575 laptop
take wifi card out lenova b575 laptop
(Posted by Anonymous-69952 11 years ago)