HP ProBook 4720s Support Question
HP ProBook 4720s Support Question
Find answers below for this question about HP ProBook 4720s - Notebook PC.Need a HP ProBook 4720s manual? We have 3 online manuals for this item!
Question posted by wasmali on September 1st, 2014
Hp Probook 4520s Laptop Wont Start Up
The person who posted this question about this HP 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 November 2nd, 2014 6:51 PM
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 HP ProBook 4720s Manual Pages
End User License Agreement - Page 1
... EQUIPMENT: This
End-User license Agreement ("EULA") is a legal agreement between you and HP or its suppliers. The term "Software
Product" means computer software and may contain a EULA... back-up purposes. You may not separate component parts of any portion of download. HP and its online documentation.
Other
software may include associated media, printed
materials and "online...
End User License Agreement - Page 2
...use a Software Product identified as an upgrade, you fail to comply with /for your HP Product, whether in any product identification, copyright notices or proprietary restrictions from the Software Product...
6.
a. You may only be licensed for the original Software Product identified by HP unless HP provides other form, may not sublicense, assign or transfer the license or Software ...
End User License Agreement - Page 3
...TO THE SOFTWARE PRODUCT. U.S. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL HP OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING,...THE SOFTWARE PRODUCT, OR OTHERWISE IN CONNECTION WITH ANY PROVISION OF THIS EULA, EVEN IF HP OR ANY SUPPLIER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND EVEN IF ...
End User License Agreement - Page 4
... as constituting an additional warranty. Rev. 10/03
5096-031*
355096-031 To the extent the terms of their respective companies. The only warranties for HP products and services are duly authorized by the laws of the State of residence and, if applicable, you are of the legal age of this...
PERJANJIAN LISENSI PENGGUNA-AKHIR (Indonesia) - Page 4
... subject to change without notice. Jika ada ketentuan dalam kebijakan atau program HP untuk layanan dukungan yang bertentangan dengan ketentuan EULA ini, maka yang berlaku adalah ketentuan EULA ...ini
© 2003 Hewlett-Packard Development Company, L.P. HP shall not be trademarks of their respective companies. Nothing herein should be construed as ...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 2
... without notice. Intel, Core, and Celeron are trademarks of its proprietor and used by its proprietor.
First Edition: March 2010
Document Part Number: 598082-001 HP shall not be construed as constituting an additional warranty. The information contained herein is a trademark owned by Hewlett-Packard Company under license. The only warranties...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 9
1 Product description
Category Product Name Processors
Chipsets Graphics Panels
Description
HP ProBook 4520s Notebook PC
HP ProBook 4720s Notebook PC
Intel® Core™ processors ● i7-620M, 2.26-GHz (Turbo up to 3.33
GHz), 4MB L3 cache ● i5-540M, 2.53-GHz (Turbo up ...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 10
Category Memory
Description
HP ProBook 4520s UMA
15.6-in HD LED backlight panel:
•
● 1366×768 AntiGlare
● 1366×768 AntiGlare ...215; 1)
● 2048-MB total system memory (1024MB × 2, dual-channel)
● 1024-MB total system memory (1024MB × 1)
HP ProBook 4520s discrete •
HP ProBook 4720s discrete
•
2 Chapter 1 Product description
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 11
.../1000 Ethernet network interface
•
card (NIC)
S3/S4/S5 wake on LAN: AC only mode
•
Integrated WLAN options by way of MiniPCI card:
HP ProBook 4520s discrete
HP ProBook 4720s discrete
3
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 12
Category
External media cards Ports
Description
HP ProBook 4520s UMA
HP ProBook 4520s discrete
HP ProBook 4720s discrete
2 WLAN antennas built into display assembly •...
•
Bluetooth 2.1
•
•
•
Integrated WWAN options by way of HP Mobile Broadband Module:
Supports only HP certified WWAN options •
•
WWAN module UNDP Gobi2 including GPS • with ...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 13
... 2007
•
Personal (Japan only)
Windows 7 Professional with Office 2007
•
Personal with PowerPoint (Japan only)
Windows 7 Professional with Office 2007
•
Professional (Japan only)
HP ProBook 4520s discrete •
• • •
•
•
• •
HP ProBook 4720s discrete •
• •
• •
• • •
5
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 14
... (Japan only)
Windows 7 Starter with Office 2007 ready • (excludes Japan)
Windows 7 Starter 32 with MS
•
Basics (Japan only)
HP ProBook 4520s discrete
• •
•
• • •
HP ProBook 4720s discrete
• •
•
• • •
6 Chapter 1 Product description EDGI
Windows 7 Professional 32 with XP Pro
•
images with...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 15
... Vista 64 versions
•
Windows 7 Professional 64 versions
•
End-user replaceable parts:
AC adapter
•
Battery (system)
•
HP ProBook 4520s discrete •
•
• •
•
• •
HP ProBook 4720s discrete •
•
• •
•
• •
7 Starter/Home Basic
•
Windows Vista Home Basic 32
•...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 16
Category
Description
Hard drive Memory module Optical drive WLAN module WWAN module
HP ProBook 4520s UMA
HP ProBook 4520s discrete
•
•
•
•
•
HP ProBook 4720s discrete
•
•
•
•
8 Chapter 1 Product description
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 136
...tools NOTE: For detailed instructions, perform a search for these topics in case of system instability, HP recommends that you print the recovery procedures and save them for later use the backup files to..., back up your most current backup. The system repair discs (select models only) are used to start up your system on a regular basis to an optional external hard drive, a network drive, or ...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 138
...reformats the hard drive. NOTE: For additional information on the computer are unable to boot (start up . Performing a recovery
In case of system failure or instability, the computer provides .... For additional information, refer to improve the security of the Windows partition and the HP Recovery partition. Using the Windows recovery tools
To recover information you are permanently removed....
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 139
...factory.
To find the partition, select Start > Computer. Using a Windows 7 operating system DVD (purchased separately)
If you are unable to http://www.hp.com/support, select your computer and ...erases hard drive contents and reformats the hard drive. For contact information, refer to enter HP Recovery.
5. When prompted, press any software installed on the computer are permanently removed. ...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 142
... drivers that were installed at the factory must recover your computer. Refer to improve the security of the Windows partition and the HP Recovery partition. To find
the partitions, select Start > Computer. Follow the on the computer are permanently removed. All files you have created and any software installed on -screen instructions...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 143
... Vista operating system DVD, go to enter HP Recovery. 5. If possible, back up all personal files. 2. For additional information, refer to boot (start up) your computer, you must purchase a...drive contents and reformats the hard drive. Click Next. 6. To find the partition, select Start
> Computer. Select Repair your operating system and programs using the Windows Vista operating system ...
HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide - Page 145
...instructions.
NOTE: The backup process may take over an hour, depending on -screen instructions.
Click Start > All Programs > Accessories > System Tools > Backup. All files you have previously backed up...the computer is added to the document. Software, drivers, and updates not installed by HP must be manually reinstalled. Save the document. Follow the on the computer are permanently ...
Similar Questions
Why Is Power Button On Hp Probook 4720s Laptop Blinking
(Posted by windjw99 9 years ago)
How To Restore Hp Probook 4520s To Factory Settings
(Posted by ackdeni13 10 years ago)
How Do I Enable Mic On Hp Probook 4530s Laptop Computer?
(Posted by LEAKirchner 11 years ago)
My Power Lite Is On But My Laptop Wont Start
(Posted by cliffndew 12 years ago)